I thought of using this method, I'm just nervous that the fish would disturb it and the soil would ruin the tank.I've been using fluval stratum since they sell it at Petco. Seems to work fine. I have used Mr. Aqua aquasoil in the past and noticed no difference. I have heard good things about miraclegro organiz potting soil with a layer of heavier substrate like the stratum on top. If I were to set up another planted tank that's probably what I would do.