Question about Buffering Capacity in pond!

Plaster of paris from lowes also works well. Fill the bottom of a laundry
basket, let it harden and dry, put it in the filter or out of the way.

Jim

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Webwarlock wrote in message
...

OK, so I got a pond kit to test my bond.
I read it as the ph level was too high and the total buffering
capacity was too low. According to the instructions I have to add
Sodium Bicarbonate (baking soda) to bring it up.

My question is, is the standard baking soda in the grocery store ok to
use as long as I just get pure baking soda? If so how much should I
add?
My pond is about 2000 gallons.

Thanks for the info.