What do you guys think of the below Regulator, now with CO2 Art offering free shipping it becomes more viable to order it @R.C. Dual stage and pressure adjustable at 60 pounds is R1080 excl taxes. http://www.co2art.co.uk/products/aquarium-co2-dual-stage-regulator-and-solenoid-magnetic-valve Professional Aquarium CO2 Dual Stage Regulator and Solenoid Magnetic Valve This regulator minimise increase in output pressure as pressure drops in gas cylinder and will prevent end-tank-dump. Quality design and construction achieves excellence in control. Integrated 220-240V Solenoid (Magnetic) Electrical Valve (suit 220-220V electricity supply). Adjustable working pressure up to 5 bar (will let you run more than one diffuser) Dual gauge pressure indicators (tank volume and flow pressure / working pressure) Industrial-grade Precision Needle Valve. Innovative design provides extreme accuracy, dependability, and extended service life. As pressure drops in the gas cylinder, our regulators are designed to minimise the resulting increase in outlet pressure, thus resulting in reduced gas costs, reduced cylinder handling, and improved accuracy. Compatible with various size of CO2 Cylinders (from 12 oz to 20-lb). The thread is made according to UK, Europe, Japan and Taiwan standard (DIN477 / W21.8-14 / JIS m22-14), 22mm in diameter. Carbon Dioxide is introduced into the planted aquarium ecosystem though the use of a CO2 regulator. The regulator is designed to reduce the high pressure inside of a CO2 cylinder to a lower, usable pressure that can be dispensed into the aquarium. During photosynthesis, plants use carbon dioxide and water, combined with light energy, to produce oxygen and sugars. We specialize in CO2 regulators for the planted tank. Our custom CO2 regulators are designed, built, and tested to surpass the highest standards in CO2. Our regulators feature high-performance solenoids and bubble counters to achieve excellence in performance. Our team is always working hard to ensure that we provide our customers the best possible CO2 equipment, we stand behind our equipment. We are confident that our CO2 regulators and systems rise above the competition, see the difference for yourself.