Why is your fish tank losing water?

If you are losing water in your tank, it is probably because of evaporation. No matter if you have a fish bowl or a fish tank, if it's in direct sunlight, the water's gonna evaporate. Another way you could be losing water is something called "fish intake". Most fish absorb water through their skin, and they replace it with their... bodily fluids. And most of what the fluids are is carbon dioxide and other things that take the place of water. Now there's more air in there and less water. Hope you find this useful!

P.S.-- If you find that the water is lower because of fish intake, add a bit of water IMMEDIATELY!!! The lack of water means lack of oxygen. Your fish could suffocate!

P.P.S-- On that cheerful note, good-bye!