recently had a huge ich outbreak and all the fish i could save are in a quarantine right now; red finned fairy wrasse, and a pair of black and white clowns. they've been in hyposalinity for about 3 weeks now in a 10g with live rock and a regular carbon filter. i've recently been told that copper is the only sure way of getting rid of ich. however, i've also heard the downsides of copper. anybody have personal experience with it, i already bought some cupramine and i'm hesitant to use it, i also don't have a copper test kit, is it a must? also it says i can't run any filter media for two weeks, can i still do water changes and just add the correct amount of drops to the new water i put in? or should i just leave them in the hyposalinity for another 3 weeks, i just don't want to kill my fish. thanks guys.