I know I could probably go find the answer somewhere easily, but I'll ask here instead.
How old are Red's when they start to lose those spots. On average. Mine seems to be getting the glitter thing goin but not losing his spots.
I think it depends on the individual fish and age more than size. I have a little wild red that is about 4.5 inches that i have had for about 9 months that lost his spots a long time ago but has not grown.