Might be cheaper to use Soda Ash instead of baking soda, thats whats
used in swimming pools. Grandpa

~ jan JJsPond.us wrote:

Here I go again:

I've often heard Baking Soda will lower a high pH. I'm wondering just how
MUCH BS a pun? is needed? My lily pond is 3 yo 1,000 gallon EPDM with 6
fantail goldfish. I've added enough baking soda recently that the KH read
280/ppm today after adding 4 cups of BS. The pH is still reading over 9.0,
and I added 2 more cups this evening.