Can someone point me to some sort of calculator so I can figure out how to dose my ferts for a DW natural tank. From what I read there will still need to be minor dosing since it is more than likely the bioload won't produce enough food for the plants. I understand that I can not go by the Seachem instructions. I do have minature syringes that can dose small amounts. I have the full line of Seachem fert packs. The tank has been running for 2+ weeks, but I just got my plants in yesterday and packed my 4 gallon real tight. There is a layer of peat underneath my Eco-complete. I only have a Betta in the tank. Once the tank is cycled I am planning on adding more live stock. My guess is 2 Oto's, and maybe some shrimp. Or maybe shrimp and a m/f pair od dario dario's. I would love to add a pygmy cory and an oto but it seems Cories need groups of six or more to thrive....Either way there will be two more small fish in the tank....