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Freshwater Aquariums: Most Popular Articles

These articles are the most popular over the last month.
Siamese Fighting Fish
A profile of the Siamese Fighting Fish (Betta Splendens), including habitat, care, feeding, and breeding.
Freshwater Fish Photo and Profile Library
A comprehensive library of freshwater fish photos and profiles.
How to Clean a Fish Tank
Cleaning even a very dirty aquarium isn't all that hard when you know what to do. Here are the tools you'll need, and instructions for making your tank look beautiful again.
Cloudy Water
Virtually everyone experiences it at one time or another. What causes cloudy water, and how do you clear it up? These answers will clear things up for you.
Ich
How to diagnose and treat Ich (Ichthyophthirius multifilis)
Aquarium Sizes and Weights
Standard sizes for aquariums, and filled weights.: weights aquarium
Coldwater Fish Species
When choosing fish for a community tank, one of the factors that should be considered is the optimum water temperature for the species you are choosing. Fish that require warm water should not be kept with fish requiring cooler water. Here are some options for coldwater fish.
The Nitrogen Cycle
The Nitrogen Cycle
ammonium (NH4)
A definition of the aquarium term ammonium (NH4)
Zebra Danio
A detailed profile of the Zebra Danio (Danio rerio), including habitat, care, feeding, and breeding.
Ammonia Poisoning
How to diagnose and treat Ammonia Poisoning
Nitrates
The significance of nitrates in the aquarium are arguably less understood by fishkeepers than the effect of ammonia and nitrites. Although nitrates are not directly lethal in the way ammonia or nitrites are, over time high levels of nitrate have a negative effect on fish, plants and the aquarium in general.
Water pH
What is pH and what is normal in an aquarium? Should you be concerned about pH? Knowing the basics will help avoid disasters that can prove fatal for your fish.
Fin Rot
How to diagnose and treat Fin Rot in aquarium fish.
Lifespans of Aquarium Fish
Ever wondered how long your fish will live? Lifespans of aquarium fish vary considerably depending on the species, as well as the care they are given. This list provides a yardstick of what to expect for your fish.
How Many Fish?
Many new fish owners overstock their aquarium and lose fish as a result. How should you calculate the number of fish your tank will safely hold? Here are the pros and cons of several methods for calculating how many fish your aquarium will hold.
A thumbnail photo gallery of Catfish
A thumbnail photo gallery of Bettas and Gouramis: pictus catfish thumbnail photo gallery catfish photos red tailed catfish glass catfish
A thumbnail photo gallery of Hatchets, Piranhas, Silver Dollars, and Tetras.
A thumbnail photo gallery of Hatchets, Piranhas, Silver Dollars, and Tetras
A thumbnail photo gallery of Angels, Cichlids (ie: Kribs, Oscars), and Discus.
A thumbnail photo gallery of Angels, Cichlids (ie: Kribs, Oscars), and Discus.
A thumbnail photo gallery of Barbs, Danios, Goldfish, and Koi.
A thumbnail photo gallery of Barbs, Danios, Goldfish, and Koi.
A thumbnail photo gallery of Guppies, Mollies, Platies, and Swords.
A thumbnail photo gallery of Guppies, Mollies, Platies, and Swords.
Aquarium Heater Guide
Find the right size of heater for your aquarium with this handy heater size guide.
Salt in a Freshwater Aquarium
Next time you have sick fish, the remedy might not be farther away than your kitchen table. Ordinary salt is a useful remedy for the prevention and treatment of several freshwater fish diseases. However, it can also be harmful if used improperly. Here are simple instructions for when and how to use salt in your freshwater aquarium.
Brown Algae
Algae is one of the most frustrating problems to deal with. Here is how to identify and cope with brown algae.
Common Names of Fish
Learning scientific names of fish can be daunting, so we all tend to use common names. However, if you wish to do any research on your fish, knowing the scientific name is invaluable. Here is a handy list of over a thousand common fish names cross referenced to their scientific names.
A thumbnail photo gallery of Bettas and Gouramis
A thumbnail photo gallery of Bettas and Gouramis: thumbnail photo gallery shirlie dwarf gourami moonlight gourami honey gold
How Many Fish can My Tank Hold
Stocking quidelines are particularly important when dealing with smaller aquariums. Here is advice about stocking a ten gallon tank.
Common New Aquarium Mistakes
Many new aquarium owners make fatal mistakes because they don't know the pitfalls to avoid. Here are top mistakes made when starting a new aquarium, and how to avoid them.
Aquarium Algae
Sooner or later everyone battles algae in their aquarium. So what is the cure? There is no single cure, because there are a variety of algae types. This algae reference explains the types of the algae types seen in aquariums, their causes, and cures.
Nitrite Poisoning
How to diagnose and treat Nitrite Poisoning
Columnaris
How to diagnose and treat Columnaris
Omnivore, Hebivore, Carnivore
What are they anyway, and what difference does it make? Believe it or not, it's wise to know what dietary category your fish fall into. If you don't, you may not be feeding them the foods they need.
How Much to Feed Fish
One of the most common mistakes made by fishowners is overfeeding fish. Just how much and how often should you feed your fish?
Blue Gourami
A profile of the aquarium fish known as the Blue Gourami (Trichogaster trichopterus), including habitat, care, feeding, and breeding.
Dwarf Gourami
A profile of the Dwarf Gourami (Colisa lalia), including habitat, care, feeding, and breeding.
Canister Filters
The top choices for Canister Filters.
Tiger Barb
A profile of the Tiger Barb (Barbus tetrazona), including habitat, care, feeding, and breeding.
Neon Tetra Disease
How to diagnose and treat Neon Tetra Disease (Pleistophora hyphessobryconis)
A thumbnail photo gallery of Fish.
A thumbnail photo gallery of fish.: siamese tigerfish thumbnail photo gallery figure eight puffer shirlie archer fish
Aquarium Water Testing
Aquarium water testing is a critical part of fishkeeping, yet is universally overlooked. Often the reason is due to the fact that the fish owner is unaware that testing their aquarium water is necessary, or what to test for. This feature covers all the basics of aquarium water testing, and explains when you should test your water.
Mini Aquariums
Mini aquariums are the rage. Are they the perfect addition to your college dorm, or classroom? Do your homework before buying one, and you'll have a greater chance for success.
Black Moor
Did you know there are well over one hundred varieties of goldfish? Learn about various varieties of goldfish as you browse this colorful goldfish gallery.
Feeding Your Fish
A comprehensive fish feeding resource of articles and product reviews about aquarium fish foods.
Converting to Live Plants
Many aquarium owners have gazed at planted aquariums and wished they could have live plants. Unfortunately most don't know where to start. This series of articles follows a new aquarium owner, Sheila, as she converts her tank from plastic to live plants. Every step of her journey will be documented in her own words, along with tips and advice from an expert plant grower and your Guide.
Velvet
How to diagnose and treate Velvet disease
Cloudy Water in a New Tank
Cloudy water can be both frustrating and baffling. Here are ways to deal with cloudy water in a new aquarium.
DIY Aquarium Projects
No need to buy it when you can make your own. Here are instructions for doing a wide variety of your own DIY aquarium projects.
Fish Health
When fish are sick, they can't tell you what is wrong. If your fish appear to be sick, this resource will help you diagnose and treat them. You'll also find tips to prevent future illness.
Betta in a Vase
Why a Betta should not be kept in a vase
A thumbnail photo gallery of All types of Rainbowfish.
A thumbnail photo gallery of all types of Rainbowfish.
Aquarium Plants - Real or A...
What kind of plant is better for your freshwater aquarium, real or artificial? Here are the pros and cons of real versus artificial aquarium plants.
A thumbnail photo gallery of All types of loaches.
A thumbnail photo gallery of all types of loaches.
Blood Parrot
A man-made cross breed fish, the Blood Parrot has been widely debated. Regardless of what side of the fence you are on, they are well established in the aquarium trade and not likely to disappear anytime soon.
Gourami Care and Breeding
Fish from the Gourami family are among some of the most hardy and popular aquarium fish. Although relatively easy to care for, it's wise to learn about their basic needs if you are planning to keep one in your aquarium.
Sexing Fish
When trying to breed fish, obtaining a pair is critical. Unfortunately, determining the sex of fish isn't always an easy task. Here are some tips for sexing various species of fish.
Guppy
A profile of the Guppy (Poecilia reticulata), including habitat, care, feeding, and breeding.
Figure Eight Puffer
A profile of the Figure Eight Puffer (Tetraodon biocellatus), including habitat, care, feeding, and breeding.
Upside Down Catfish
A profile of the Upside Down Catfish (Synodontis nigriventris), including habitat, care, feeding, and breeding.
Clown Loach
A profile of the Clown Loach (Botia macracanthus), including habitat, care, feeding, and breeding.
Removing Aquarium Snails
Snails have been the bane of aquariums as long as they have existed. They can be held at bay using these simple steps.
Female Betta
Photos of female Siamese Fighting Fish (Betta Splendens), including habitat, care, feeding, and breeding.
Weather Loach
A profile of the Weather Loach (Misgurnus angullicaudatus), including habitat, care, feeding, and breeding.
Freshwater Fish Photo and Profile Library - Alphabetical listing by Common Name
A comprehensive library of freshwater fish photos and profiles, sorted by common name.
Aquarium Filters
Biological and mechanical filtration is critical for maintaining a healthy environment in your aquarium. The aquarium, filter type, size, and media you select will depend on many factors. Don't let all the choices overwhelm you. Before you buy an aquarium filter, arm yourself with the basics about the type of aquarium filter you need.
Catfish
A library of freshwater Catfish photos and profiles.
Is Bleach Safe For Aquariums?
Broach the subject of using bleach to clean an aquarium, and a heated discussion about safety is sure to follow. So is it safe or not? Read on for the answer.
Kissing Gourami
A profile of the Kissing Gourami (Helostoma temminckii), including habitat, care, feeding, and breeding.
Live Plant Journal - Part 1
This is the first in a series that follows a new aquarium owner as she converts her tank from plastic to live plants. Every step of her journey is documented in her own words, along with tips and advice from an expert plant grower and your Guide.
Substrate For Planted Tanks
Choosing the proper substrate for your planted aquarium can make the difference between success and failure. Plant grower, Don Matakis offers his advice on choosing substrates.
Do Water Changes Kill Fish?
It's a commonly heard, but not completely accurate story, that water changes are bad and will kill your aquarium fish. How did the story start, and is there any truth in it? Like many misconceptions, there is a kernel of truth behind it.
Fish Facts: Silver Dollar - Freshwater Aquariums
All about the Silver Dollar, from your About.com Guide
Green Water
Algae is one of the most frustrating problems to deal with. Here is how to identify and cope with green water
Phosphates in the Aquarium
Phosphates are one of the primary causes of algae overgrowth in the aquarium. Yet many aquarium owners don't even know what phosphates are, much less how to get rid of them. Here's what you need to know about phosphates in the aquarium.
Harlequin
A profile of the Harlequin (Rasbora heteromorpha), including habitat, care, feeding, and breeding.
Aquarium Light Fixture Guide
One of the decisions you must make when purchasing an aquarium is choosing the type of light you want. This light fixture guide will help sort out the proper size fixture and bulbs for your tank.
Schooling Fish
One of the most enjoyable scenes in an aquarium is a group of fish swimming in unison, changing directions in an instant, yet never colliding with each other. How are they able to swim in unison?
Aquarium Cleaning Supplies
Need to clean your aquarium? With the proper equipment, it's a breeze. Here are my top choices for aquarium cleaning supplies.
Aquariums Under 15 Gallons
The top choices for aquariums under 15 gallons.
Leaving Aquarium Lights On
Aquarium lights usually don't come with a tag saying when to turn them on and off. So, how long should aquarium lights be left on?
Levels of Community Fish
Choosing fish that prefer different levels results in a more attractive aquarium and assures that your fish will not have to compete for space. Here is a list, split by preferred level, of one hundred fish that can be part of a community tank. Keep in mind that water conditions (pH, temp, hardness), size, and compatibility must also be considered when choosing fish for your community tank.
Aquarium Glass Residue
White residue on aquarium glass and equipment is an annoying fact of life. Here's an inexpensive and simple way to remove it.
Mickey Mouse Platy
A profile of the Mickey Mouse Platy (Xiphophorus maculatus), including habitat, care, feeding, and breeding.
Glow In The Dark Fish
Banned by some, coveted by others, glow in the dark fish are the latest in long line of altered fish. The debate is hot and heavy over the sales of genetically altered pets. What do you think about them?
Good First Fish
Your aquarium is set up and you're ready to add fish. Excitement is running high, you are ready head to the pet shop. But do you know what to buy? Learn about good first fish, and why some common favorites aren't best for a brand new tank.
Ranchu
Did you know there are well over one hundred varieties of goldfish? Learn about various varieties of goldfish as you browse this colorful goldfish gallery.
Blind Cave Fish
A profile of the aquarium fish known as the Blind Cave Fish (Astyanax fasciatus mexicanus)
Aquariums for a Child or Teen
If you have a child or teen who wants an aquarium, you may be scratching your head and wondering where to start. If you do your homework and make good choices, your young person will have a much higher chance for success. Here's what you need to know.
Bloodfin Tetra
A profile of the Bloodfin Tetra (Aphyocharax anisitsi), including habitat, care, feeding, and breeding.
Red Wagtail Platy
A profile of the Red Wagtail Platy (Xiphophorus maculatus), including habitat, care, feeding, and breeding.
Black Neon Tetra
A profile of the aquarium fish commonly known as the Black Neon Tetra (Hyphessobrycon herbertaxelrodi)
Keeping Bettas Together
Compatibility is important when choosing fish for your aquarium. Some species, such as the Betta, aren't even compatible with their own kind.
Bronze Cory
A profile of the Bronze Cory (Corydoras aeneus), including habitat, care, feeding, and breeding.
Aquascaping 101
A primer for getting started with live plants, written by Birgit Fruehwirth
Pearl Gourami
A profile of the aquarium fish known as the Pearl Gourami (Trichogaster leeri)
Black Phantom Tetra
A profile of the aquarium fish known as the Black Phantom Tetra (Megalamphodus megalopterus)
Livebearer Photo Tour
Guppies, Mollies, Platies, and Swordtails all have something in common. They have live young, and they are all colorful fish. This photo tour can attest to their attractive coloration.
Gold Barb
A profile of the Gold Barb (Barbus schuberti), including habitat, care, feeding, and breeding.
Black Widow Tetra
A profile of the aquarium fish known as the Black Widow(Gymnocorymbus ternetzi)
Water Changes
Water changes are the cornerstone of a healthy aquarium. Like it or not, they need to be done. Here's why you should perform them, and tips for making it an easier task.
Red Eye Tetra
A profile of the aquarium fish Red Eye Tetra (Moenkhausia sanctaefilomenae), including habitat, care, feeding, and breeding.
Can I Replace My Aquarium Gravel?
A Q & A about replacing aquarium gravel: aquarium gravel gravel bed gallon aquarium bacterial colonies beneficial bacteria
Bubble-eye
Did you know there are well over one hundred varieties of goldfish? Learn about various varieties of goldfish as you browse this colorful goldfish gallery.
Do rocks affect the water pH?
Rocks and other items used to decorate your aquarium can and will affect the water chemistry. Here is what to look for when considering rocks for your aquarium.
Common Fish Names - A
Learning scientific names of fish can be daunting, so we all tend to use common names. However, if you wish to do research on your fish, knowing the scientific name is invaluable. Here is a handy list of common fish names that begin with the letter A, cross referenced to their scientific names.
Veil Tail
Did you know there are well over one hundred varieties of goldfish? Learn about various varieties of goldfish as you browse this colorful goldfish gallery.
Choosing Fish Foods
Choosing the right food for your fish is a key factor in maintaining the health and long life of your pet. Although there is no single food that is good for every fish, if you follow these four basic steps you won't go wrong.
Don't Flush That Fish!
Why fish owners should never flush fish down the toilet
Fiddler Crab
A profile of the Fiddler Crab (Uca pugnax), including habitat, care, feeding, and breeding.
Shubunkin
Did you know there are well over one hundred varieties of goldfish? Learn about various varieties of goldfish as you browse this colorful goldfish gallery.
Bala Shark
A profile of the Bala Shark (Balantiocheilus melanopterus), including habitat, care, feeding, and breeding.
Goldfish Foods
Top Goldfish foods for keeping your goldfish healthy and happy.
Live Plant Journal - Part 3
This is the first in a series that a new aquarium owner as she converts her tank from plastic to live plants. Every step of her journey is documented in her own words, along with tips and advice from an expert plant grower and your Guide.
How do I Sex a Gourami?
Determining the sex of your freshwater fish isn't always straightforward. These tips will help you determine if your Gourami is a male or female.
Power Filters
The top choices for Power Filters.
Pearl Danio
A profile of the Pearl Danio (Danio albolineatus), including habitat, care, feeding, and breeding.
3 Foot Planted Aquarium
Anthony Lee Wencheng created this amazing planted aquarium.
How Much do I Need?
Everyone has basic questions about how much and what size is needed when setting up an aquarium. Here is a collection of information about the size of tanks, heaters, filters, volume of substrate, as well as conversion charts.
Black Banded Leporinus
A profile of the aquarium fish known as the Black-Banded Leporinus (Leporinus fasciatus)
Allen's Planted Tank
Planted Aquariums
Q & A - Vacation Fish Feeding
The care and feeding of aquarium fish is a big concern to fish owners planning a vacation. This care and feeding checklist assures that your freshwater aquarium fish will be well provided for while you are away.
Matching pH
Matching the temperature has traditionally been the factor people are cautioned about when taking a new fish home. Truth be told, pH is just as important. Here is what to consider when trying to match the pH of your water to your local fish store and the needs of the fish.
Live Plant Journal - Part 2
This is the second in a series that follows a new aquarium owner as she converts her tank from plastic to live plants. Every step of her journey is documented in her own words, along with tips and advice from an expert plant grower and your Guide.
Silver Dollar
A profile of the aquarium fish known as the Silver Dollar (Metynnis argenteus)
Comet
Did you know there are well over one hundred varieties of goldfish? Learn about various varieties of goldfish as you browse this colorful goldfish gallery.
Cardinal Tetra
A profile of the Cardinal Tetra (Paracheirodon axelrodi), including habitat, care, feeding, and breeding.
Pictus Catfish
A profile of the Pictus Catfish (Pimelodus pictus), including habitat, care, feeding, and breeding.
Selecting a Filter For Your Aqaurium
What to look for when selecting a filter for your aquarium, from your About.com Guide
Lionhead
Did you know there are well over one hundred varieties of goldfish? Learn about various varieties of goldfish as you browse this colorful goldfish gallery.
Redtail Catfish
A profile of the Redtail Catfish (Phractocephalus hemioliopterus), including habitat, care, feeding, and breeding.
Common Fish Names - B
Learning scientific names of fish can be daunting, so we all tend to use common names. However, if you wish to do research on your fish, knowing the scientific name is invaluable. Here is a handy list of common fish names that begin with the letter B (page 1), cross referenced to their scientific names.
What is a Paludarium?
Everything you wanted to know about paludarium.: newts salamanders paludarium shedd aquarium fish lovers paludariums
Pelvicachromis pulcher
A profile of the Kribensis (Pelvicachromis pulcher), including habitat, care, feeding, and breeding.
Aquarium Fish Health Benefits
Do you have a stressful life, high blood pressure, insomnia? Keeping an aquarium may be good therapy for you. Studies going back as far as the late 80’s have shown that gazing at aquarium fish reduces stress and subsequently lowers blood pressure.
Wimple
A profile of the Wimple (Myxocyprinus asiaticus), including habitat, care, feeding, and breeding.
Beard Algae
Algae is one of the most frustrating problems to deal with. Here is how to identify and cope with Beard Algae.
Oranda - Bronze
Did you know there are well over one hundred varieties of goldfish? Learn about various varieties of goldfish as you browse this colorful goldfish gallery.
Blue-green Algae
Algae is one of the most frustrating problems to deal with. Here is how to identify and cope with Blue-green Algae.
Ryukin
Did you know there are well over one hundred varieties of goldfish? Learn about various varieties of goldfish as you browse this colorful goldfish gallery.
Dietary Types of Aquarium Fish
Not sure what you should feed your fish? Is it a meat-eater, or a vegetarian? This list of feeding types will answer that question for you.
Moonlight Gourami
A profile of the Moonlight Gourami (Trichogaster microlepis), including habitat, care, feeding, and breeding.
Giving an Aquarium as a Gift - Checklist
A checklist for giving an aquarium as a gift.: christmas holiday season ammonia test saltwater aquarium lighting options filtration system
Common Goldfish
Did you know there are well over one hundred varieties of goldfish? Learn about various varieties of goldfish as you browse this colorful goldfish gallery.
Rosy Barb
A profile of the Rosy Barb (Barbus conchonius), including habitat, care, feeding, and breeding.
Angelfish - Marble
A profile of the Angelfish - Marble (Pterophyllum scalare), including habitat, care, feeding, and breeding.
Betta Gender
Determining fish gender isn't always easy, but Bettas are one species that is relatively simple to sex.
The Basics of Feeding Your Fish Live Foods
The benefits of feeding your freshwater fish something more than flakes.
Red Bellied Piranha
A profile of the Red Bellied Piranha (Serrasalmus nattereri), including habitat, care, feeding, and breeding.
Q & A - Where to Keep...
Answers to your questions about freshwater aquariums and fish
Stocking Your Aquarium Evenly
One of the factors often overlooked when choosing fish for a community aquarium is the level the fish prefer. Choosing fish that prefer different levels will result in a more attractive aquarium, while assuring that the fish will not have to compete for space.
Buying an Aquarium
Before purchasing an aquarium consider the needs of the fish that will live it, the care the aquarium will require, and the location where it will be kept. Here are the important factors to consider before you buy an aquarium.
Explore Freshwater Aquariums
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