Just ordered my second one for my other tank after getting this, it's perfect and VERY well made. Folks, doing CO2 can be SUPER EASY and A LOT cheaper than you think. I have another thread about it on another product on here. For the guy dipping his foot in the water, you have to check it out. Fluval's 90 gram CO2 kit goes for like $70 and I should have save one of those cannisters to compare to the size of a 5lb. tank. Having the bubble counter and a check valve in one and putting it right on top of a the regulator simplifies CO2 to as easy as it gets. I've wasted a lot of money, not any more. I have two 5lb tanks running and they've been going for 2 weeks (the 90 gram cardtridges would last a little more than a week) and honestly that tank will probably last a year.