I have three electric blues they are about 3-3 1/2 inches now. they eat fine but seem a Lil skittish to me or sudden movements. when should I add them to my 265 gal tank that has a 5 inch Escondido, a 6 inch chocolate, a 5 inch hetrospilious, a 6 inch melaranus, 3 - 4 inch geos, 5 - 4 inch sevs, a 2 inch lyonsi, a 6 inch pearsi, and I'm using 4 Congo tetras and 6 giant danios as a dither. any advice from other owners of them or people who have kept them please.