Hey guys. You probably get this question a lot, but I have a planted tank I want to run Co2 in, but all the options online are confusing me a bit. To my knowledge, you need a Co2 canister, diffuser, tubing, tests, and the regulator. Should I buy those Co2 kits I see online that come with everything or should I buy everything separately. What would you guys recommend? And how many pounds should the canister be and how long will it last me?