Beware of poor quality!
I purchased a Fzone mini co2 regulator. After 2 weeks I received a faulty item which was leaking. Customer service sent me a replacement which was working ok at first. After 5 weeks of use the regulator stopped working properly. Luckily I discovered it quickly, otherwise my shrimp and fish would’ve been dead because of the amount of bubbles it was suddenly producing. Refund was refused because waranty only lasts 1 month.