I hope this isn't an emergency, but last night I noticed a pink mark on one side of my Dwarf Gourami's mouth. It looks almost like a cut. I'm not sure what could have caused it, or if it's dangerous, but any advice would be appreciated. His behaviour is otherwise completely normal and he is feeding normally.
Tank size is 64l with a sand substrate
Tank mates are 2 platies and 6 neons (platies have been in 3 months, the Gourami has been in 2 months, and the neons have been in 1 month).
Tank temp is roughly 25C
I do 15% water changes weekly (using aquasafe and occasionally stress zyme and plant food)
ammonia - 0
no3 - 50
no2 - 0
ph - 7.6
Tank size is 64l with a sand substrate
Tank mates are 2 platies and 6 neons (platies have been in 3 months, the Gourami has been in 2 months, and the neons have been in 1 month).
Tank temp is roughly 25C
I do 15% water changes weekly (using aquasafe and occasionally stress zyme and plant food)
ammonia - 0
no3 - 50
no2 - 0
ph - 7.6