Hi all, I have a 175l bowfront with 13 guppies, 1 albino pleco, 2 gauramis, 1 molly, 1 albino ruby tail shark, 3 platys and about 15 Molly/guppy hybrid fry. Ph 7.5 NitrIte 0 NitrAte 80 (bit high I think) Ammonia 0 I have noticed in the last couple of hours my fancy male guppys tail has a clean split down the middle, doesn’t look ragged or rough (so I don’t think it’s from nipping) Was wondering what could cause this other than rough decs/plants and a strong filter. I’ve checked all. Really hoping it’s not fin rot (always assumed it was raggedy looking) if anyone has any answers for me id greatly appreciate it. Thank you!