Hello! I recently started up a 29 gallon freshwater tank about 3 and a half weeks ago. At the moment I have 2 gouramis (neon blue dwarf + flame dwarf), 3 mollies (black sailfin + 2 balloons), 1 swordtail (red velvet), 1 pleco (bristlenose), and two mystery snails. All of them have been getting along very well, they're all very active and i've seen no signs of distress thus far. Today I noticed that one of the balloon mollies is persistently trying to nip at the lower belly portion of the other balloon molly almost as if it is trying to eat something off of it. I thought it might be trying to eat the other's waste. If thats the case, is it normal for them to do that? I wouldn't be asking if the one molly was not so determined to do whatever it is that its doing. Any advice is greatly appreciated. Thanks.