I have a royal gramma with Ich. He's in a 29G biocube reef tank with 3 other fish. I'm planning on seting up an emergency quarantine tank for the royal gramma, but if possible I would like to avoid quarantining the other fish. My question is, if my other fish ( clownfish pair and goby) are immune and not showing signs will the Ich parasite die off while the royal gramma is in qt for 6 weeks? I was thinking he would just get re infected when he goes back in the display. I know quarantining can sometime stress fish out and it makes me a little nervous moving all of them. Also what's your opinion on quarantining a sick fish? Thanks for help!!