I did a lot of reading, and the consensus was that Hydroton is inert and had no effect on Ph (other than Weeze, there was only one dissenter).

I ran a test w/ new hydroton (well rinsed) with tap water ph 7.12. I soaked the Hydroton for 36 hours. The water then ph??ed at 8.62. I poured out the 8.62 (rinsed well) and replaced it again w/ 7.12. I??ll try to remember to report again after a second soaking. I realize that in a situation where the solution has a much lesser contact with the Hydroton the ph raising aspect will be lessened. But something to be considered as ??part of the whole?.

I'd advise you to start your res water at 5.2 because the H'tron will try to raise your PH constantly, even when properly conditioned.

It seems that the WeeZard knew his stuff again?..gotta?? pay attention to experience!

As instructed,
Horsemanrocks.