P5 is a beast. Seems we have some comparison - my male is approximately the same size and age as p5 (Around 4-5 months old; 5-6" svl). This is some great documented growth compared to your others. I kind of would of liked to do this, but I didn't pick my guy up as small as yours was.

I'm curious as to what p5's regimen that he gets (diet, and how often)?