Dont add fish till your AMAZONIA cycle is overrrrrrrr! give it two to three weeks at least. maybe less if youre using an established filter. also, im a believer in the less chemicals, the better. sometimes just water and dechlor will do the trick, no need for fancy additives (besides ferts) speaking of which, let your plants settle and the initial AMAZONIA dose of ferts before you start dosing dry. and 12 brigittae will attribute almost nothing to the bioload. probably as much as 2 tetras would. i dont see why adding a party of hasbrous or something wouldnt work