Well I'm thinking of keeping them in buckets for a few days, then moving them to the current cycled tank and moving those out. The three fish in there will be over 14 days in therapeutic copper this Friday. I can throw those ones in a new QT for the prazi treatment and I won't have to lower the copper too much in the current QT tank.Sounds like a lot but I bet they are all really small. If the 20 is well cycled, well maintained, I don't see a problem for quarantine.