There may be a titration method for pH, but I'm not sure. I've got a Hanna pHep 2 probe with temp correction that works great, but it really don't use it that much. I found that the accuracy of the phenol red is plenty close enough for my pool. Maybe if I was doing some "emergency green pool" fixes, I might use it, mainly because many of those pools might be out of the range of a phenol test. Heh, I should put mine up for sale.

Michael