I've been using it for a month. The tank itself looks well made, as does the regulator. The bubble counter fit is a little loose and needs to be handled with care. The kit does not include the materials required, so make sure you order them with the kit. It's not clear, but the required powders are citric acid and baking soda. I ordered them from Amazon as a separate order. I swapped out the diffuser for a better brand with fine bubbles. I found it was 10mg of each powder per 1psi of pressure. 22 psi is the safe use recommendation in the instructions. To do this I had to use 220mg of each powder and the recommended water as stated in the instructions. Turn the bottle, not the valve! This will help close the bottle faster and keep the reaction inside. After 24 hours of waiting, it is ready for use. Great product if the bubble counter lasts and the savings come on time you don't have to pay to fill up the tank. However, this is not intended for large tanks. I use it on a 17 gallon tank for size reference. UPDATE: I am still using this product and it has been great. No problems after a year of use. I still recommend it to anyone with a modest aquarium.
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