Ok. I have read through alot of threads on here and most of them talk about co2. I would like to make my 40 gallon tank into a successful planted tank but i really want a basic setup (ie: no co2) could anyone give me advice on good substrates to use and basic fertilizers etc for fast and easy growing plants. I am just trying to achieve a healthy looking planted tank with basic plants and little fuss. Any advice would be appreciated.