I destroyed these fish about 2 weeks after my last post on this topic. I have since been given 8 neons and 2 of there lines faded almost completly so i isolated them and they died.( ithink they died of lack of oxygen cos the tank was 29degrees and they were in a small container. I think one more neons red is starting to fade. What should i do now? It is a 70L tank and In the tank i have some BN, hoplos, corys, kuhlis, dwarf loaches, glowlight tetras, black widows, head and tail light tetras, blue rams and some others. and all the other fish appear very healthy. Any ideas? I have no idea what to do.