Originally Posted by hoppycalif
Now that is a creative burst of inspiration!! I should be able to find some scraps of Tyvek, and I had forgotten completely that it is a semipermeable membrane, and a very rugged one at that. If I can find some scraps at Home Depot, for example, I will try to make a KH reference "condom" for my pH meter and see how it works. THANK YOU!! If you also post at Tom Barr's forum I suggest you post this there. If I don't see it in a day or two I will post the idea myself.
You're welcome and post away. I barely have time to post in this forum.