I do want to thank both Tim and Jay for responding so quickly. As you know,
when your obsessive about a pond you like to resolve issues like this as
soon as you can.

I have a pond which has cement only towards the top of it... about the top 8
inches and it's about 2 1/2 feet deep. I would think that after 2 years the
cement would not be problematic. Especially as little cement as I have
used... ???

I did empty the pond 1/2 way recently and then refilled it. However, I did
not check the PH level until after doing so and so did not ad the muriatic
acid until after adding the fresh water.
Cheers!





"T" wrote in message
ink.net...

"Go Fig" wrote in message
...
In article , simplesoul
wrote:

Hello folks!
I just wanted to see if anyone had a situation like mine and therefore
some
advice to give. I have a 2 year old, 1500 gallon pond with 6 medium
sized
koi. I just began testing the PH level recently and found it very high
(over
9). I was told to carefully and gradually add Muriatic Acid to bring
the
PH
level down. I did and for a very short period of time, brought the PH
level
down to about 7. However, it doesn't stay 7 very long and spikes right
back
up to nearly 9.

Any guesses on why the PH level doesn't level off?

Is this a concrete pond ?

jay
Thu May 20, 2004



Thanks in advance for anything you can offer.
Steve



Do you just top off the water in the pond? Or do you regularly change it
by
removing water and replacing it??

Tim