Should I have foamy bubbles forming on top of my 10 gal freshwater aquarium?
Foamy bubbles can be a few things. First it is a sign that your water quality isn’t good. With a brand new tank, that is filled the way you have it my guess would be that this is your problem. Your tank is a bit overstocked, especially since there are several kinds of tetras of all different sizes. For a 10 gallon you’d really only be able to get about 10 neon tetras in it OR 4 danios, not both. And depending on the type of catfish you have, one on its own is probably too big for the tank. A good rule of thumb is one inch of fish per gallon of water. And you measure the fish by their adult size, not their current size. If you do not cut back on the number of fish you are going to have to keep dealing with frequent water changes and other issues of a crowded fish tank – it isn’t fun. Did you cycle the tank? If you didn’t, that is probably the issue, and don’t feel guilty, a lot of stores never bother to tell you this stuff when you get a tank. Just running the empty tank doesn’t let it
