Possibly the most heartbreaking thing a fish owner experiences is finding a fish laying on the floor in the morning. A well fitted aquarium cover will ensure you don't have to lose fish, and has the added benefit of reducing evaporation of aquarium water. There are several types of covers, from the lid, hood, and canopy combination, to simple glass lids. Which do you need, and does it come with your aquarium? This list explains the differences and uses for each.Photo © Shirlie L Sharpe

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