I have two issues currently. I have a 300 gallon HEAVILY stocked FOWLR that includes tangs, triggers, angels, puffers and eels (please dont judge ) I have been dealing with ich with 2 failed attempts at hyposalinity. Even with an autotop off and testing, as soon as i bring the salinity back up i see white spots again. And now i have a blue tang that has black flatworms. So my question is...should i treat with prazipro first? how safe is it to treat the display tank? and then should i treat with copper to get rid of the ich once and for all. Is copper safe for the puffers and eels? Please help, thanks