Did you see the link I gave you? It describes that by diluting the humus in a 50:50 mix of sand, then layering laterite over it, and toping it off with 2" of fine gravel you will have the optimum substrate solution. Just like Enrinco's tanks, which don't recieve any liquid fertilization. His E.stellata is still pink after one year, and all his plants still look quite good. So what's the key to not screwing this up? Thanks