If you use aquarium nutrients the chances are you would of seen wets Nutrient Calculator - Yet Another Nutrient Calculator at rota.la but its sad to say wet passed a few months back meaning the calculator has been offline since. So ive created another website hosting wets source code. rotalabutterfly.com Along with a few others we will have this running asap. Currently the calculator works 75% Quote from some feedback.. "The new one is kinda working, at least if you calculate for premixed solutions or DIY/Dry Dosing. Its not calculating correctly when choosing "a solution"."