How much baking soda can I add in a day?

[aylad]

I have a test kit and I am very confused.

I had the numbers run a week ago at a different store . .

If you have a drop-based test kit, I would just test the water yourself and forget the pool store.

Janet

[waste]

Melissa, welcome to posting on the post crash forum!!

You say that the pool is 4 yrs old, how old are the reagents for the test kit, if they are the same age as the pool, it's probably time to replace them - bad reagents may be the cause for the discepency, or as other's pointed out a lot of pool stores couldn't accurately test water to save their lives

[waterbear]

Depending on how the pool store is testing the results they gave you might be accurate or not. If they are using strips and strips reader then I would not trust the readings. If they are using liquid or dry reagents with a colorimeter then I would (assuming they are doing the tests correctly, a BIG if!)

[mwsigler]

I bought a new test kit about 3 weeks ago.

I took my water, to the place I have been taking it and everything was fine except the cooper which I knew was a problem.

The akalinity was a little low - 60 so I will be working on it today.

This place just had their machine calibrated 2 weeks ago, so I assuming their numbers are good.

I had another friend tell me not to take it to the place I went the other day.

So we will go with the first place.

But really how much baking soda can I add in a day? Just curious?

[Watermom]

It's probably going to take somewhere in the ballpark of about 12 lbs. of baking soda to get up to 90 or 100. I would add 3 lbs. at a time and wait about 4 hours to let it circulate. Then, retest and see where you are. Better to do it in small doses rather than all in one shot. As long as you space the doses out by about 4 hours and retest before adding more, I think you'll be OK.

[mwsigler]

Thank you so much.