Would it work to do 1 round of Prazi, 4 weeks copper(therapeutic dosage), 1 round of prazi, then another 4 weeks of copper work better? Otherwise do a normal copper treatment after 2 rounds of prazi and making sure the fish are eating well. Then do observation. Just trying to get down a very good idea of how my proactive treatment will work before I actually get any fish and do it. Having them die because of bad dosing or methods would be heartbreaking(and wallet breaking).
Remember that copper is bad for fish (cupramine is more gentle). I recommend four weeks followed by observation for four weeks.