Granted you are starting with quality stock (good genetics) lots of clean water and quality food should yield you nice results. I got all of my fish from Kenny in the 3" range. There were a couple that were really behind the others but they ended up catching up and are now some of the largest. If you are willing to do the large wcs then I feel 3" is a food size. You can watch them change from a fish with very little pattern or color to big beautiful fish if done right.