I have a 50 gal freshwater tank. I have great filtration system. However, i just added about 5 neon tetras and they only swim at the top. (i have two sets of bubblers already) is this normal?
Every fish does this it means that it doesn't have enough air. I had this problem with my fish, there is a small pipe and machine that you can put into the tank and the pipe deposits air. Your fish will swim around more freely with more air in the tank.
