I understand all of the treatment to do for my blue hippo tang. He's only been in the tank about 3 weeks and has come down with a case of ich. I also know that I need to move all of the fish to QT. My question is what size QT tank is best for 2clowns and 1 Tang. I've seen that a lot of people use 10gal tanks but it seems like that may be to small for these three. I'm am still new to the hobby and regretablly didn't get around to setting up my QT tank ahead of time like I should have. His ich seemed to come out of nowhere but it's all over him and I want to get them moved and start hypo tomorrow. The clowns don't show any sign of it thankfully.