You CANNOT use Copper in the DT if you have inverts!
Hyposalinity is meant for a QT tank, not the display tank. Inverts remain in the DT while the fish are treated in the QT.
Keeping the SG
at 1.009 or lower is not all that hard, certainly no harder than maintaining a therapeutic level of copper. I found it easier.
Aged tank water is just that, AGED (and depleted) tank water. Using a fresh mix at the same SG
and temp as the DT is the preferred method.
can only affect the parasite during short (~48hour) period and then only if they pass through the UV
device. At that stage the parsite goes to ground looking to attach to the substrate where they will encyst and grow.
Mike linked the articles on the life cycle; here's the article on Hyposalinity