peacock cichlid help

Hello all :D i have a 45 gallon, 4 foot long tank, the nitrite is currently reading 0.5, so its not too long before i can finally put in the fish!! Here is my stocking list. :) 4 juvenile yabby/crayfish/crawdads/crawfish (They have so many names, but as confusing as they are, they are VERY good...