As I have said this in Posts in APC and in APD (
Re:Subject:earthworm castings) years ago, here is an article that refers to my tanks aswell on this (
Natural Fertilizer for planted tanks) I have been using Greek Forest Soil from Decidious trees for the last 27 years I never even bothered to boil or do anything else with it, I would remove the stones and big wood pieces out of it add some handfulls from localy extracted laterite I collected myself and dump 5 cm of it in the tank wet it to turn into mud add 3-4 cm gravel on top and that was it there would be initial algae in this tanks for 2 months but once they stabilized they would go perfect with no problem whatsoever for 3 years. I have made 100's for myself and friends ALL of them had incredible success. I have used this approach with MH lots of times tons of light in some cases, also some tanks had CO2 and some did not I never used column ferts. This days I try masochistic experiments using a ton of ferts in the column.
