i've been having livebearers for half a year now, and they die after a month! all of them =/. Either from fungus or internal infections. Yet my other fish in there are very healthy. I ahve 6 glass catfish, 3 SAE, 8 cardinals, 7 otos, 3 swordtails, 3 ballon mollies. My tank is a 50 gallon planted...