You get what you pay for
I bought two of these, the first one snapped at the CO2 connection when I try to install it. For the price it was I ordered a second one. The second one is running fine but it does not dissolve the CO2, I have tried running it at two bubbles per second up to six bubbles per second, I have tried running it with a 150 gallon per hour power head and a 325 gallon per hour power in and I always have the same results, microbubbles spitting out the return. I ended up filling the entire chamber with crushed up biomax figuring the bubbles would have to work their way through the media and dissolve and even that did not work. Save your money and buy the correct tool for the job. Also this thing is made of extremely cheap plastic not acrylic so be careful when handling I feel like it's very thin and green crack easy
Verified purchase: YesCondition: New