I have a 60gpd RO unit, but with my water pressure it probably does more like 80gpd. The RO/DI feeds directly into the Kalk Reactor, but remember I have a 500g+ system and this rate seems to be fine as far as PH levels go.

Actually, I like the uni-seals! I had to take the reactor apart a few times to rework pumps, etc. Stressing the hole in the tube a few times I think resulted in the crack .. then it got worse over time. I like the rectangular reactor idea - nice flat surfaces for bulkheads ;) Dan's shooting for completion this next weekend, fingers crossed!