I had a decent tank with 3 chromis, a dottyback, two clowns and a lawnmower gobby that I had bought all at the same fish store. Well, the wife fell in love with a coral beauty angel that we had seen at another fish store and we bought it along with a sand sifter. Well to make a long story short, the angelfish had ICH and it has managed to kill off every fish in my tank but 1 Chromis. I was told to switch the food to frozen shrimp soaked in garlic, zoe and ich attack and to remove the filter and start ICH treatment. It has been 3 weeks since the last fish has died and the owner of the fish store I go to (never going anywhere else EVER) said I should try some more Chromis to see how they do. I havent done a water change in a month because I also heard i wasn't supposed to. I plan a water change this weekend because I just put the filer back in. I'm just scared to put more fish in to my tank. What should I do? Plus I haven't been into saltwater aquariums for long and I don't have the money for a quarantine tank. Any advice?