I have a dwarf gourami and some black phantom tetras in with amano shrimp and assassin snails. I suspect the gourami may have ich, but not sure - he has one white spot but is showing no odd behaviour. All other fish appear normal. I'd like to get some medication on hand to use if I am able to confirm ich but I know some is not safe for invertebrates. Can anyone recommend a treatment that is shrimp and snail safe? Or am I better off moving the shrimp and snails out during possible ich treatment?