I just set up my reefer 750 3 months ago and transferred all of the livestock from my reefer 350. Unfortunately, when I added new livestock 4 weeks ago, my sailfin started showing signs of ich and the sohal I bought was chasing everyone. The ich that started on my sailfin got to all my fish about 3 weeks ago but I didn't worry as all my fish were eating just fine. Just yesterday, I noticed white stringy poop coming from my clown fish. Today, my blue hippo tang who usually gets excited over food decided not to eat and rather just looked at the food. I am left now with no easy options as with what to do. I know how crucial quarantine is and had always done this with my old reefer 350 but did not want to do that with the fish I added 4 weeks ago. The reason I didn't quarantine the recent fish I added was because the store said all their fish are quarantined before they are listed for sale. At this point, it would be nearly impossible to get every single fish out of the tank and into quarantine since I am not willing to take down my aquascape that I spent 12 hours on. Please let me know of any ideas as to how to get these fish better. All advise would be greatly appreciated during this frustrating process.