I'm dealing with internal parasites again. The first time I treated by adding GC and Focus to food, and it worked great. Now a different fish is exhibiting signs (this fish was added to the DT right after treatment of the fish in the DT). Either I didn't eradicate the parasites from the DT or the new fish brought more internal parasites from the QT after two rounds of GC. Last time I treated the fish in the DT, I fed the medicated food twice per day for seven days and then once per day for two days, but I didn't do a second round of treatment. Should I do a second round this time?