FZONE Aquarium CO2 Regulator Mini Series V3.0 Dual Stage with DC Solenoid and Bubble Counter Check Valve Compatible Paintball Tank CGA320 CO2 Cylinde

I was so nervous about this, about how it goes together, would it leak, etc.There are not many instructions because you don't need many instructions. I screwed it to a paintball container (nice and tight) and locked the bubble counter into position. Attached the airline tube. Slowly opened the main valve and then the metering valve and checked for leaks... none. All that worry for nothing.It does take a bit of fiddling to get the gauge and bubbles to settle into a happy relationship, but I just went slow until it reached an equilibrium. I have a 15-gallon tank and I started with 1 bubble every 2 seconds (set a timer on my phone for 30 seconds so I could get an accurate count. At that rate, my drop checker was not changing colors. So first, I turned off my air stone during the day, still no change in color. Then I increased the bubble count SLIGHTLY, and at about 1 bubble per second, I just blue green, which is the 15 ppm I'm shooting for.I'm so glad I took a chance on this and not a much more expensive regulator that looks to be the exact same thing.

Phenomenal CO2 regulator. Comes with everything you need for a regulator. Brief, concise, and comprehensive instructions make installation a breeze. Also comes with an accompanying wrench to tighten CGA320 fitting. Adjusting the output pressure is easy and the guage provides clear legible pressure readings. Same can be said for the bubble counter/needle valve assembly. Overall great choice if you are looking for a simple, yet comprehensive CO2 regulator.

I got a SodaStream to paintball adapter (VaVoger) and have this on top of a SodaStream bottle (that I can exchange at Walmart for $14). I had some confusion, and screwed the SodaStream adapter directly into the CGA320 fitting (since it WOULD screw in). So, I had to remove the needle valve from my SodaStream adapter. If I'd known paintball and CGA320 used the same threads, I'd have done it right and not have had to modify my SS adapter. Or maybe, if I'd just read the instructions? LOLIt works and doesn't leak, so I'm leaving it as is. I'm running 50 PSI into an Aquatop in-line diffuser, in-line with my FX4 canister filter output. Right now I'm at 1 bubble per second for my 75 gallon tank. My CO2 is getting 100% dissolved before it hits my custom spray hose. (It's an FX hose with like 30 1/4" holes drilled into it). With my FX turned to about 80-90% output. I have no bubbles coming out of the output, and no fizz in the tank. I know it IS working because I have a UV light with clear fittings after the diffuser, and I can see the CO2 bubbles go into and out of the UV light, but they get dissolved inside the light (more go in than come out) and by the time they get to my spray setup, they are dissolved 100%.However, FYI, at 50% output (the FX canisters are wicked powerful, the FX is almost 4x too much for my 75 gallon) I did have bubbles/fizz and bubble purges coming out of the UV light. AKA, the CO2 would build up in the light, then come out in big burst then shoot out of the hose. When I turned the filter up, all that stopped. I have it set up this way to give the CO2 as much time and distance to dissolve as possible, and the turbulence through the light seems to help. I have too much current now really, but the fish seem to like it to be honest. Just passing along my experience.My drop tester is delayed, so I'm keeping it at 1 bubble per second in my 75 gallon, and I do have two 18" air bars running on the sides of the tank, with the air pump turned all the way down for a pretty tame amount of agitation, just for limited surface gas exchange. To be on the safe side. I'm interested to see what my saturation is since I'm getting 100% dissolved, but even at 1 bubble per second in that big tank I feel it's fine. Just keeping a close eye on the fishes.All that to say, I'll report back on how long SodaStream bottles last on a 75 gallon tank with some air agitation going on. I'll have to get my drop tester to be sure I'm saturating, but I'm not shooting for 30 ppm, my goal is more like 20 ppm. I want to help my plants, but my fish are the main show. I want to always error on their side vs. the plants. But after 3 days, the plants are already responding.

Have had this regulator for about a year now (bought here). It has performed very well on my planted shrimp tank.I was changing the CO2 cylinder and accidentally broke the coil off of the solenoid. My fault, not a defect. I emailed them about the problem and they took very good care of me, quickly, and very reasonably priced.I will buy from FZone again, they are a good company with good products..