Recent content by tomdav

Well, mystery has been solved. It seems the muriatic acid I purchased at Lowes was diluted 50% to make it "safer". Gee half strength for the same price, thanks Lowes! Once I doubled the muriatic acid the PH is back in balance.

I'm assuming the manufacturer spec for spa volume is correct. That said, miscalculating volume should only impact the ppm of borates added (ratio of borax to muratic acid shouldn't vary by volume). I added 10.5 oz borax and 5 fl. oz muratic acid. ph hasn't gone down so I guess I'll just add...

Hi, question regarding how to reduce excessive ph after adding Borates. I used the calculator to determine the appropriate mix of 20 mule team borax and muratic acid to add 25 ppm borates for my 375 gallon spa. I started with balanced water (7.6 per my calibrated ph meter). I added borax...