I am a bit wacko when it comes to planted tanks. There is a layer of peat and red clay in the bottom, then some houseplant fertiliser granules, lots of sand and some Tetra Crypto tablets and clay/peat/PMDD -balls. I add PMDD 4 times a week and there is also CO2-thingy. Oh, and I add peat extract when I do the 1/2 water change once a week.