Hi,i kinda have 5 discus in my tank all about 5 cm in length.They kinda start to nibble my neons fins and even my loricariid catfish also bitten by it.May i noe why they did this???
Grow ur neons out a bit in a seperate tank if u can then add them they should b fine. I keep cardinal tetras with my discus and they do great.[same size as neons]well the discus was a 5cm baby.And after i gave them some freeze dried tubifex worms they stop their habits of disturbing my 4cm neon tetras(pure neons!!!!!Not black neons!!!)Oh yah i kept some black widow tetras with the neons and the discus plus a few baby angels and adult cories.