this is what i have in the tank 2 Clown Loach's 4 glowlight tetre's 3 neon tetre's 1 Black Phantom Tetra 2 Head-n-tail Light Tetra's 2 Silver Shark's and 1 Corydoras paleatus. I know clown loach's are highly susceptible to Ich so do i take him out and treat him or leave him in and treat the tank?