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Old 09/24/2017, 11:16 PM   #13
RC Mod
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 87,272
I would stop dosing the baking soda for a while, to see how that goes. Most tanks will be fine with Kalk only, although a few might need a bit more alkalinity. There are a few processes that will throw the ratios off:

Jonathan Bertoni
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