Please help..........I am not sure what to do about one of my 2 bosemani rainbows who has some sort of a legion I am finding hard to ID. See pics.
He has been this way for a few weeks - and seems completely fine in behaviour and everything else. All other fish in the tank are fine and living the dream

, all except this one

.
Tank perameters looking good, too;-
pH: 7.0
Nirite /
ammonia: zero
nitrate: 7.0
I've checked out all kinds of meds and none seem to fit these symptoms. Besides, if it was anything serious - either others will have got it, or he'd be dead or ailing in other ways by now, no
Can anyone help

