So I used to never quarantine fish. When I had my 100 gallon I got tired of ich showing up, going away, showing up, going away and so on. So I finally decided to take out all the rocks, catch all my fish, split them half in the 55 I had set up at the time and the other few in a 37 gallon quarantine. Lost a few fish due to ammonia because I didn't have the 37 set up long enough before putting the fish in there. Lost all three of my cardinals which only left my two clowns in there. Got a scopas tang once I got the tank to normal because I wanted to try the copper treatment on another fish besides just clowns. Left my 100 gallon empty for 12 weeks. Finally got my first surviving fish and the scopas back into that tank then treated the sailfin, kole tang, and arch eye hawkfish. Took almost three months to get rid of the ich from my sailfin tank. By the time they were better I got my 150. So I moved everything to that tank that day. Hadn't see any ich since then. Quarantined all new fish for at least a month. Well we got a new fish store which is where I got my hippo tang. They quarantine all their fish and treat with copper before selling them. I saw their quarantine tanks. I bought the hippo and went ahead and put it in my qt for a week but didn't treat for anything. I figured he was good to go since they quarantine. Well low and behold a week after putting him in my 150 he's got ich. Had several spots the other day. Now just a few. No other fish has it. My question is what would you guys do? Tear it all down again and treat all the fish again and leave the tank empty for 12 weeks again? I plan on getting a 240 gallon sometime within the year. Should I do this knowing I'm just going to move everyone around again when I get that? Or just wait until I get the 240 before treating anything? I've had half my fish for over a year. And the others almost a year or at least half a year not including the hippo tang. Do you think everyone will be ok through it as long as I don't get more fish? Any advice appreciated thanks