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Unread 01/30/2018, 03:44 PM   #3
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 88,616
The usual guess is that anything above 8.6 is reason to be worried. Does the tank have a skimmer? Maybe it could use a bit of a tuneup? Aeration might help with this issue.


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Jonathan Bertoni
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