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1PoolDoctor, Owner
Category: Pool and Spa
Satisfied Customers: 78
Experience:  Past President & Regional IPSSA Officer. Over 20 yrs of Swimming Pool/Spa experience in Service, Repairs and Construction.
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I open up my pool and used 6 bags of shock plus two bottles

Customer Question

I open up my pool and used 6 bags of shock plus two bottles of algicide per pool store. Water was relatively clear with some green spots on bottom before adding chemicals. Next day water was cloudy white and can't see bottom. Brought sample to pool store to be tested. Called for more shock (2 bags), 5lbs of balance pack 100 because alkalinity was off and 1.5 lbs of stabilizer as cyanuric level was low. Two days later white cloud still exists and I see no improvement. Cannot even begin to see bottom...what to do next? I feel pool store will just keep telling me to buy expensive chemicals that won't help.
Submitted: 2 years ago.
Category: Pool and Spa
Expert:  1PoolDoctor replied 2 years ago.
Hi, I am here to help you with your question.
1. Do you have a D.E. filter?
2. Is there any powdery substance on your steps or benches?
3. If not D.E. filter, It could have also been from Alkalinity being too high.
Just simply adding Muriatic Acid to the water to balance Alkalinity may solve the issue.
4. You need a 4-way test kit to test these things:
a. Chlorine
b. pH
c. Acid demand
d. Alkalinity
After you test the water, let me know what your readings are.
We can continue to communicate here until you are satisfied I have answered your question.
Thanks, Bill
Customer: replied 2 years ago.

1. I have a Hayward sand filter.

2. There is no powdery substance that I can see.

3. Alkalinity seems ok according to test results below.

4. Chlorine- 5, pH 7.5, alkalinity 80, hardness 200, cya 30-50.

Still very cloudy, no bottom in sight.

Expert:  1PoolDoctor replied 2 years ago.
Thanks for this information Jennifer.
It helps me a lot.
Your water looks good and your chlorine is strong.
Your chemicals are not the issue.
Your sand filter is not filtering the sediment out of the water.
5. What is your filter pressure now?
6. What is your filter pressure when the filter is clean (after backwash)?
7. How often have you been backwashing your filter since you started up the pool?
You may have to backwash more frequently while it is cloudy especially if the pressure goes up on filter. Or the filter has an issue and it is not filtering properly.
Let me know what you discover this time.
Any pics of your pool or equipment will really help me too.
Thanks, Bill
Customer: replied 2 years ago.

My pressure was around 20. I backwashed and rinsed and it's looking much better. Thank you! What is the normal pressure and at what pressure should I automatically backwash?