Small piles of dead algae back in system through jets.

[jeanft]

I have been brushing the pool with light algae but it seems that some are back at the bottom through jets. I vacuum it in the deep end using a canister with a bag, but I guess some is not stopped by the grids during the day. They might need be replaced. No DE comes out after backwash.
What should be the desired output on an Aquarite for pump running for 8 hours/Houston?

 

[ajw22]

How many gallons in your pool?

What size T cell?

What % do you have the Aquarite set at?

What test kit do you use?

Post your water chemistry from your own test kit…

FC
CC
pH
TA
CH
CYA

Do a Overnight Chlorine Loss Test

 

[jeanft]

T.9 r 1.40 AL-0
Aqua at 70%
FC 3.6
CC
pH 8 Added 4 drops of reacting agent to be at 7.4 2.29 qt for 20,000 gallons/ 1.43 gal for 50000 gallons. Where should I go?
TA 160
CH 230
CYA 70/80

First test. Might be wrong. Will run CLT tonight

 

[ajw22]

For CYA 80 your FC should be around 6 and never fall below the minimum of 4.

The Free Chlorine and Cyanuric Acid Relationship

Managing your cyanuric acid and Free Chlorine levels is key to stabilizing your pool. Learn how these two items affect each other.

www.troublefreepool.com

Reduce your pH from 8 to 7.6.

Use PoolMath to calculate the amount of muriatic acid you should put in.

How many gallons in your pool?

 

[jeanft]

Thank you Allen. Pool is 27,000 gallons. I will add muriatic acid to lower PH, have been using extra chlorine.
I have read that CYA 80 is OK for hot summers in Houston. Do I need to push output on cell to produce more chlorine? Or remove water? I entered all info in my signature, I don't see all the details.

 

[ajw22]

Pool is 27,000 gallons.

What is your daily pump runtime?

I will add muriatic acid to lower PH,

40 oz of 31%% Muriatic Acid will lower your pH by 0.4 and bring your pH down from 8 to around 7.6

have been using extra chlorine.

If you have a T-9 cell it is too small for your 27,000 gallon pool.

You need to run the T-9 cell at 100% for 24/7 to generate enough chlorine for a day.

Your T-9 cell will generate 4.3 ppm of Free Chlorine if run at 100% 24/7.

I have read that CYA 80 is OK for hot summers in Houston.

CYA 80 is fine.

Do I need to push output on cell to produce more chlorine?

Your T-9 cell will generate 4.3 ppm of Free Chlorine if run at 100% 24/7.

That is barely normal FC loss in your area.

Or remove water?

Dunno what that will accomplish.

I entered all info in my signature, I don't see all the details.

Did you enter it in the Profile area or the Signature area?

 

[jeanft]

My mistake. It's a T-15. The pump runs for 8 hours. Remove some water and add more to lower CYA. I used account details.

 

[ajw22]

It's a T-15. The pump runs for 8 hours.

Your T-15 running for 8 hours at 100% will generate 2.1 ppm of Free chlorine.

What % do you have it set to?

Remove some water and add more to lower CYA.

CYA 80 is ok in Houston. You will find it will degragde over the summer and drop down naturally.

I used account details.

Look next to Account Details for Signature and put it there.

 

[jeanft]

2.1 ppm of Free chlorine with such a high CYA level is not great. Is it OK to have the cell output on 100%? I remember running it as high, not knowing what was the best option. The CYA level was in the 40/50s.

 

[ajw22]

2.1 ppm of Free chlorine with such a high CYA level is not great. Is it OK to have the cell output on 100%? I remember running it as high, not knowing what was the best option. The CYA level was in the 40/50s.

It makes no difference to the cell if it runs at 10% or 100%.

In Houston you need 3 to 4 ppm of FC per day.

You need to run your T-15 at 100% for more like 16 hours per day for 4 ppm of FC, or 65% for 24 hours.