Either is fine bro', the difference between GH's CaliMagic and their organic line GO, is that the first one is fully synthetic, and partly made with a nitrate, so it has that 1-0-0 value (a non-issue for that low of N input), and the latter is organic and all Ca/Mg carbonates in a fermented sugar base.... most hydro nute's are synthetic,.. there are applicable organic nute's for it, but I gather it's more challenging to use them because of the interaction and sometimes problematic activities of the various microbes, which can muck up things... I'm not hydro-experienced myself, so look up others here to get feedback on hydro-organic culture,... :smoking: