How high did the pH go? If it did not go above 9 then it is ok. Trying to
lower it with acid to get it down to 7 or some other magic number consumes
alkalinity as measured with a KH hardness kit. The KH is what helps you
keep a stable pH and should be around 100 or more. If it drops to less than
40 then you are in danger of a pH crash. Are you reading the pH morning and
evening? If the KH is low, then you will have very large changes morning
low to evening high.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html
"rob" wrote in message
.cable.rogers.com...
Hi,

I just finished my new pond in the spring. EPDM liner, 12 x 10 x 4'6".

I added plants which are doing well and my kids wanted some fish. I want
to
put Koi in the pond.

I did some reading and realized that 0.1% salt in the pond was the first
thing to do since my PH was fine.

I added the salt up to 0.8% and noticed that my PH went through the roof.
I
have been adjusting the PH by adding Muriatic acid. The PH drops
temporarily and then begins to rise. When the PH reaches 8.2 or higher I
add more of the acid. Every day for the last week I have been doing this.
What in my pond is causing the PH to continue to want to go high? I have
no
concrete and only plants with unscented kitty litter as the soil. In all
there is approximately 18 kgs of kitty litter.

Rob