The Planted Tank Forum - View Single Post - Using Oil-Dri for cheap substrate?
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post #29 of (permalink) Old 09-08-2012, 03:34 PM
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Originally Posted by Diana View Post
Yup, I bet the STS is taking over and removing KH. KH is totally crashed and pH is at the bottom of the chart. Added 2 tablespoons baking soda; this ought to raise the KH by about 4 German degrees of hardness, and bring the pH up a bit.
Hi Diana,

I realize that baking soda will raise the dKH, and I use an online calculator to determine the amount of baking soda to add to accomplish the desired change.

How were you able to determine the dGH (General / German) change that would occur by adding the two tablespoons of baking soda?

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