Damn that sounds pretty tight, you do an ebb and flow right? yeah, alright cool cool. i'm going to be running some organics in a while here, probably ff happy frog mixture with ocean forest, perlite, verm, worm casings, bat guano(maybe, preferably from fruit bats but idk where the hell i'll find it), little bit of sand, then a rock layer at the bottom of the pot for better drainage. if not ff ocean and happy then just good regular soil(with added perlite, etc.) plus botanicare liquid karma, cal mag, and Pure Blend Pro Bloom Soil. i will be happy to get a p in a sq meter my expections are like 12 to 14 zips and that would suffice for some time.