Recently the daughter of a friend set up a Marina Mermaid 2.65 gallon aquarium. The ambient room temperature was quite cozy on the day she set up the tank, but when winter hits that may not be the case. With such a small tank, the issue of how to heat it can be challenging. Fortunately there are now a number of heaters for small aquariums. If you are keeping fish that require warm water, particularly Bettas and other heat loving fish, you should consider a mini heater for your small tank. Photo © Shirlie L Sharpe
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