Getting Calcium Levels Right

[FormerBromineUser]

So, jmarcum, did you lower that pH? Don't feel bad. We all have been there!

[jmarcum]

I lowered the ph....now it takes 6 drops of R-0006 to get up to 7.0.

TA: 40
CH:250
CYA:35-40

[JimK]

Up to 7???

I hope you didn't drop your pH below 7 (7.2 is the lowest I would go). Doing so risks damage to your pool.

[jmarcum]

Yes, as in its under 7.0. Trying to determine how much baking soda I need to add now. :-(

[jmarcum]

Seems like it's actually borax I need not baking soda. Is that right? I don't know how to calculate this because I don't know what my ph actually is (since it was completely off the charts low)

[JimK]

Seems like it's actually borax I need not baking soda. Is that right? I don't know how to calculate this because I don't know what my ph actually is (since it was completely off the charts low)

Yes, you use borax to raise pH.

Here's a tool you can use to calculate doses

http://www.troublefreepool.com/calc.html

You may have to initially estimate your pH and go from there. Try raising pH a little at a time instead of trying to do it in one shot.

[jmarcum]

Thanks, I have their iOS app. From an estimated 6.5 it says add just over 5 pounds. How about if I add 2.5 pounds and test again tomorrow?