Review on FZONE Aquarium CO2 Generator: 12V DC Solenoid with Bubble Counter & Power Adapter by Rob Vizitei

The product works well, there were some problems, but the seller offered a solution after many round trips. I also think the product is a bit pricey. But when you factor in the money you can spend on these small, ready-to-use canisters of carbon dioxide, this product offers an economical, long-term solution. If you have problems, be prepared to test your patience with the seller. I literally reached the limit of my patience before they offered a solution.