i decided recently im getting an arowana tatoo, japanese koi style. as dither fish or fillers in the tatoo i wanted some rainbow fish. But I didnt know which kind i wanted in there so at work today i bought one or 2 of every kind that I liked, figured Id fatten them up to get the colors out and then id be able to make a better decision. funny thing I found out in doing so is that adding this huge amount of fish to my tank made my little unstable indo datnoids become fully stable in color and no longer hiding... so im pretty happy bout that...