MOD Complete MDC99004 Aquarium CO2 Regulator Blue Mini Stainless Steel Dual Gauge Display Bubble Counter & Check Valve w/Solenoid 110V Fits Standard US Tanks LP150 PSI HP2000 PSI Accurate

Good

Better quality material could probably make this an A-1 product. Lost a great deal of its Treading after a couple tank changes. Other than that works well.

Most people in the aquarium hobby will tell you to not skimp on the regulator with a high tech CO2 system and buy one from a company like milwaukee, however, that can easily run you over $200. At only about $40, this is a huge bargain considering how well it works. I have used this regulator now on a paintball system and a 5lb CO2 tank system, and it works perfectly on both. The regulator keeps a steady flow even on a timer. I rarely have to adjust the needle valve. The needle valve is very sensitive, so take your time on it, but it's fairly easy to get the perfect BPS for your tank. The solenoid runs warm and makes some funny noises, but besides that, it runs perfectly and I have not ran into any issues in what is now over 6 months. Extra washers are included, useful considering I did destroy one by overtightening the regulator. A wrench is also included, but I recommend using your own for a little more leverage and flexibility. I learned that you can twist the bubble counter 90 degrees for paintball setups, it just requires a vice, it's very tight. The bubble counter works well, but it does empty out about every week or two, likely due to water loss from the initial purge of co2 everytime it starts up. This isn't a unique issue though, and it happens to every bubble counter so I'm not too concerned. The solenoid works well, no power=off, power=on. Overall, this regulator is easily comparable to any high end regulator. I've ran into no issues and it works perfectly. I would highly recommend this regulator to anyone who doesn't have cash to throw away. I also had a couple questions and the seller was very helpful and responsive, so shoutout to them as well.Note: Not a verified purchase because the original page doesn't exist anymore. I contacted the seller about it and they directed me to this product for a review, but I definitely purchased the same product by MOD Complete.