UP Aqua CO2 system for Charming Aquarium A149 | eBay anyone know if this system is worth the money or have used this system before? Currently using an ISTA disposable can system and ill have to use that for the meantime as im currently upgrading my tank gradually as and when i can afford to. Its lighting first, then filtration and then co2. i have put a few posts on here in the last hour and could use help and input with all of them if possible! thanks alot guys. appreciate the help. This is my first run with a planted tank. Ill post some pictures of the current layout later on.