pH of 3.5 - Never before.

[pratzert]

I have a 17K gallon AG pool. This year I started using the pucks in an in-line feeder.

I have had a few problems with algea. I turned my feeder on Max all week to kep the algeas under control.

When I did a pH test this weekend... it was 3.5 WOW ! I know this is EXTREMELY acidic.

I added two box of 20 Mule team Borax.... the pH moved to 3.8.

So i went ahead and added a 10# pail of soda ash. Let the filter run all night.

I have to check the pH today and I'll report back.

But I've never read of anyone with such a low pH, what else beslides the pucks could have made it so low.

BTW.. I'm using a pH meter which I know is correct since I calibrated it twice and check my spa too, it's working fine.

Thanks, Tim

[waterbear]

What is your TA. I suspect it is very low to cause that kind of pH bounce. The soda ash will also raise your TA along with the pH so check both!

[JohnT]

Has to be a testing issue. How are you measuring it?

[pratzert]

I'll have to check my TA.

I'm testing using a digital meter. I Double checked the calibration twice and it's fine.

I also tested my spa.... fine.... and house water.... fine.... normal readings.

I will say, that I checked the pH this afternoon and it was up to 6.5. So I aded 8 more pounds of soda ash. After 4 hours it now is ok with a reading of 7.6.

I can only assume it was those pucks.... I'll keep the auto feeder turned down more.

Thanks, Tim

[smallpooldad]

It might be best to test against liquid test kit, it seems far too low.