Hi, I am very new to planted aquariums and I have several questions I am having a hard time clearing up. I have a 50 gallon tank 36 x 18 with flourite substrate with gravel on top, and a 96 watt compact flourescent light and a standard 30 watt flourescent light. I am looking to get a co2 system but I am not sure which one to get, can anyone recomend some systems to me because I am afraid to try the whole diy because I am afraid I will waste my money because I am not too tech savy. I have seen some systems that connect to paintball co2 canisters which I have, how long would the co2 last and is a paintball co2 canister the same thing as any other co2 canister? I also need to know if my lighting is adequate. I am planning to grow low to moderate high begginer plants. Last but not least I currently have a aquaclear 300 power filter, do I need filter that will not disturb the surface of the water and what kind of filter would this be? thanks.