My fish have ich I left some in the display and was treating the display till they still got ich. So I took out alll the rock net them out and then I re-did my aqua scape. I can NOT qt the damsel with the others because the damsel can't be with my tomini. I'm not risking my favorite fish over a 15$ fish who has killed a lot of my other fish. He is in a 1.7 gallon betta tank right now by him self and I am going to treat him there but I dont have a heater. So what do I do, Is he fine with out a heater? Do I add him back to the display or put him in qt or keep him there? I don't know what to do honestly. This damsel has been such a pain anyway.