I finally moved my koi out and got 10 lemon tetras shipped in today; they are all about an inch but besides a little yellow and black on their fins they're grey. Now I know they are new and scared and all shoaling really close but I was expecting some color considering my fish tank is mainly black they aren't what I thought I was getting, In time will they brighten up with tetra color flakes? also I read about plants helping the color as well which is my aim to have a heavily planted tank.