-Bettas- Fin Nipping

[Savannah]

Hello!

I wasn't quite sure what discussion to put this under but I've been having fin nipping issues with my male long fin betta Lucky. When I first got him he would fin nip a lot. He was in bad conditions from the pet store and suffering from fin rot and underfeeding. I treated him with API Betta-fix for his fins and they healed up nicely and he quickly got into shape and new growth appeared over a month. He's got space, clean water, filter, heater, things to do, live plants, driftwood, rock but there are times where I still find him nipping parts off his tail, just not as often. There is still new growth but he ends up cutting it off himself. I was just wondering if there was any other way I could try to break his habit or if I can slow it down more. 

[Colu]

You can add a mirror to his to tank distract him or add some small tetra or endlers to tank so he doesn't focus on his fins as much 

[NanoNano]

I agree with @colu- Tankmates and plantings are both helpful.  I've assumed that my "self nipping" Bettas were gnawing on themselves either because they could see their tails out of their peripheral vision and assumed "attacker!!!!" (in which case distractions help),  or that because the fins had grown long enough to be uncomfortable (in which case time seems to be the cure).  All of my tail biters have either cut way back  to nipping once every few months or stopped cold turkey as they've matured.