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