i wouldn't treat with anything except good ol' fashioned clean water/clean tank.
how about try this, do a 50% water change + good gravel vacuuming twice a week for four weeks. report back and let us know if the angel still has the fin issue.
how about try this, do a 50% water change + good gravel vacuuming twice a week for four weeks. report back and let us know if the angel still has the fin issue.