I did Ick management for a while and got tired of seeing ick getting on my blue hippo each month, The other fish never got it, including two other tangs. set up my spare 55gal and let in cycle. I have lots of cansiter filters and HOB filters from my fresh water days. I keep a 20 gal cycled at all times. After the 55g was ready I tore down the display, had to remove 180 lbs of pukani rock with the corals attached to some. set them fresh salt water in several 35gal rubbermaid storage binds. I put all the fish in the 20gal and treated with copper for 48 hrs, then moved them to the 55g. figure I have 72 days if the Ick Shows up again. Wanted to re-do my rock scape anyway. NOT!!