I’ve been researching for months why the pH and PPM increase happened during my water test. I discussed the issue last night with a friend that works as water resource specialist for a State Dept of Natural Resources Agency and he said it could be Hydrogen Ion build up, CO2 depletion in the water, temperature swing or just evaporation of the water. I was just looking at the results with the air stone and I’m thinking now it was probably all of them.
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