Here is the link from the guy (Rex Grigg) that I found that sells quality commercial CO2 regulators and all the fittings that you need. He was very helpful in getting me setup with my calcium reactors - they are now trouble free for the first time in years. He is primarily a freshwater person and can't answer questions about calcium reactors but his equipment is better than anything that is being offered in the aquarium industry right now. www.rexgrigg.com
