I want to get a solo RBP little 1-1 1/2in. i wanna grow him out alone...but i fully understand Ps do best in groups of 3 or more...i would eventualy add him to a shoal once i get my 120g. for a solo P is it better to get one small or a lil bigger. also is it worth doing...the stores around me sell little rb's for a good price, what should i look for when selecting one...last time i bought a P i chose the one who appeared more agressive was bossed round by a feeder..any thoughts would be helful thanks