Failed after 6 months By Actuary on 9/10/12
Actuary wouldn't recommend this product to a friend
I figured I should play it safe with my calcium reactor by going with what I assumed was a relatively high-end and quality product. After 6 months (just outside of their warranty) the valve no longer closes. Thankfully I had my bubble counter dialed in pretty well so my pH didn't crash too badly in the reactor which could have destroyed my SPS reef. Guess I'll try to find an alternative regulator now and toss this $145 chunk of metal.