Or, remove the koi temporary and add 1 gallon acid to each 1,000 gallons
and let it set till the pH stays down, this may or may not take more acid.
Once the pH stays down, rinse, fill and re-start the ponding process.

To do lower pH with acid additions with fish, you first need to bring up
the KH with baking soda so you have buffering after the addition of acid.
Then you need to dilute the acid and add it slowly to the pond. Sudden
changes in pH are not healthy for your fish. ~ jan

On Fri, 21 May 2004 14:31:15 GMT, wrote:

seal the concrete. that will slow or stop leaching. Ingrid

"simplesoul" wrote:

Hello Jay,
You asked
What is the alkalinity/pH of your fill water?
It is 7.5

I guess it's useless to treat the pond with muriatic acid, hunh? I suppose
if I kept the water level below where my concrete starts that might help?
Then again my two-tiered water fall is made of concrete too.... rats
*%@#$!!!

You've been very helpful and I do thank you!!!


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~
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http://puregold.aquaria.net/
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(Do you know where your water quality is?)