Well I quarantined the veiltail and treated it 'it seems fine' the bloke at the aquatics says the loach should not suck on the fish or their fins and its abit hard to catch it if it is because it hides most of the time and blends in with the wood roots in the tank plus its only small at present, so maybe its bacterial or maybe the veiltail has been getting chased, as the other fish have started chasing one of the commets who I was sure was a male, but is the only one not showing tubecals yet?