I have always wanted a planted tank, but never had much luck. I went to the LFS and asked around the guy sold me 2 amazon swords and a grow light(i can't remember exactly what light i bought but it was maybe 20 something dollars) I also bought some stuff called laterite. I put the laterite in got the plants goin. They looked good for a couple of weeks and now everytime the leaves reach or get close to full size they die. There is a lot of new growth on it constantly. New leaves are always coming in they just die before they reach full size. What am i missing? i asked if i need some form of CO2 and i was told i wouldn't. If i do need it what is the cheapest set up? heres a pic