I wish it was only the odd rub . They seem to go into a fit every so often (multiple times while sitting and watching the tank) and just scrape on everything they can for about 10 seconds. Tail fin clamped, pectorial fins clamped.
I have a UV sterilizer running 24/7.
I haven't tried salt. 450L tank. Can I just dose the whole tank? Or use a bath of some sort?
Also have corydoras sterbai, ottos, neons in the tank.