Okay, do you think I could get away with copper treatment directly in the tank as I have no coral or CUC ? or is hyposalinity the only real option?
There is a good chance that if you dose copper in your display, that you will need to test and do a partial redose every day or so. Then, the sand and rock will have absorbed some copper, rendering it unfit for use in coral/invertebrate tanks later on.
Hyposalinity doesn't have that drawback.
