My view is to let it grow till bigger first, cos tanning is alot of stress... The juvenile may not eat properly, and will not grow well. The initial growth (The fastest at that size n age) is important to me cos, after sometime you want it to grow bigger also cannot.... my 2 cents
Side tanning could also induce drop eye... but so owners dun mind/care their focus is an AngAng red aro
I'm sure there are other views