Super_Blueberry
Aquarium Advice FINatic
So I just scored a free 100g tank, and if I can get the wife's ok to swap my 55g out for it, I want to do as much as I can correctly from the start. My 55g has plain gravel, and I'm adding root tabs everywhere. It's not ideal, but it's working. For the 100g though, I want to start with a 'dirt' substrate and cap it with sand. My question is which substrate(s) offer the longest period of fertilization before it would have to be replaced. Obviously I don't want to break it down in a year just to replace the substrate. What is the best option for the long term?