"Hello. Does a freshwater tank have to have air bubbles blown into it? I have a very tall 55-gallon tank. I bought a long, thin "bubble blower" (for lack of a better term). The idea was to have the bubbles streaming up the back wall of the tank. I cannot get the dang suction cups to stay and it keeps coming apart. Is it necessary to have the bubbles? Should I get something else? Thanks in advance for any advice!!"