how long should i keep my midas in a grow out tank the two meanst have paried and i got to move in a few weeks they have been in there for like 5 month so should i get rid of the others.i here other fish hormones can slow groth and i already THINK there growing a lil slower than normal. in 5 mon thes the biggest is about 6 inches they were all about 1.5 when i gotthem from rapps