Thanks kingdave! I guess I should maybe read up a little more on a fishless cycle. My main objective is to try to set this tank up as cheaply as I can. I cant afford to stock a 125 six footer all at once so I am gonna have to do this slow anyway. My plan is to use my 75 as a temporary growout tank until I can stock my 125. Right now I think I have around 8 peacock and haps that I know are males, half are adult and the rest are sub-adult showing a little color. If I have to move them a few a time its really no big deal. Once I have all my proven adults moved from the 75, I am going to order a bunch of juvies from somewhere and put them in the 75. Probably gonna take some time but thats the fun of it. So with all that being said, would a fishless cycle make more sense or the danio method?