Nitro Posted July 30, 2009 Report Share Posted July 30, 2009 I'd say it is outgassing, because borates are working. You're experiencing what we all do. But I could be wrong. Quote Link to comment Share on other sites More sharing options...
chem geek Posted July 30, 2009 Report Share Posted July 30, 2009 The reason I don't think it's outgassing of carbon dioxide is that the effect was still occurring even when the TA got as low as 10 ppm. The Borates will buffer against a pH rise, but it will be interesting to see what kind of acid demand remains because it takes more acid to lower the pH if and when the pH gets too high. To me, the source of significant pH rise in this case is still mysterious. Quote Link to comment Share on other sites More sharing options...
Nitro Posted July 30, 2009 Report Share Posted July 30, 2009 Oh, I didn't catch the TA of 10 ppm. That is strange. Quote Link to comment Share on other sites More sharing options...
pdampier Posted July 30, 2009 Author Report Share Posted July 30, 2009 Oh, I didn't catch the TA of 10 ppm. That is strange. Tell me about it! I have no idea what is going on. Things are still stable at 7.4 now - pH does not appear to be rising... Now I need to see if i can increase the TA with baking soda, lower the pH back down a bit and stay stable.... Quote Link to comment Share on other sites More sharing options...
pdampier Posted August 6, 2009 Author Report Share Posted August 6, 2009 So far so good.... It was steady at 7.4 so I added 2oz of Baking Soda (TA is still only 40 or so) but its now only 7.6 and appears steady... Quote Link to comment Share on other sites More sharing options...
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