Pool is still cloudy after 9 days of continuous shocking and filtering

Srbinette

Active member
May 26, 2015
34
Berlin, NH
Pool Size
24000
Surface
Vinyl
Chlorine
Liquid Chlorine
Pool was very green upon start up and we had a little trouble with the pump system. Everything seems to be running now. I have been shocking the pool quiet often. I’ve gone through roughly 32 gallons of shock. Filter has been running continuously for 9 days. We have a Hayward sand filter with new sand. Pump does have a small leak, needs a new seal, it just came in today… hoping to do the repair tomorrow. Anyway.. I did just recently purchase a new test kit as I thought maybe my reagents were too old and throwing me off. Tonight, the new kit says FC is at 10 (I added another gallon tonight to bring it back to shock level, it was at 16 this afternoon, it was a really hot sunny day) CYA 35 pH 7.2… no combined chlorine. I have been backwashing when my PSI increases to 20 (typically at around 7), that’s about 1x daily. I caved and used some clarifier yesterday. It did seem to help slightly, but I still can’t even clearly see the bottom of the four foot section. Should I just keep shocking, filtering and be patient?
 

Srbinette

Active member
May 26, 2015
34
Berlin, NH
Pool Size
24000
Surface
Vinyl
Chlorine
Liquid Chlorine
This mornings test:
FC 12
CC 0
PH 7.2
TA 80
CA 40
CYA 35
I know I need to add calcium… but that shouldn’t effect clarity should it?
 

Srbinette

Active member
May 26, 2015
34
Berlin, NH
Pool Size
24000
Surface
Vinyl
Chlorine
Liquid Chlorine
I’ll continue to shock. Thank you. I do think it’s improving, but soooo slowly. I may change out to a DE filter next year.
 
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Srbinette

Active member
May 26, 2015
34
Berlin, NH
Pool Size
24000
Surface
Vinyl
Chlorine
Liquid Chlorine
So after researching pool filters a bit, I think my filter is too small for my pool. It’s Hayward sand filter that holds 150# of sand with a 1HP Superpump. I have a 24k gallon pool. I bought the house with the pool….
 
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Srbinette

Active member
May 26, 2015
34
Berlin, NH
Pool Size
24000
Surface
Vinyl
Chlorine
Liquid Chlorine
Merged threads.
So I bought my pool with the house. It’s 24k gallon inground. We have a Hayward Superpump 1HP. Skimmer and bottom drain lines are 2”. 1 1/2” jet lines. Filter holds 150# of sand. I think I need a bigger filter correct? I am having a lot of trouble clearing it after opening this year. I struggled to clear it all last year and gave up. Changed out the sand at the start of this summer, but now I’m thinking it may be more than that….
 
Last edited by a moderator:

zea3

Mod Squad
TFP Expert
LifeTime Supporter
Jul 10, 2009
14,001
Houston, Texas
You would see the pressure in the filter rising in a fairly short period of time, like a week or two, indicating it is time to clean the filter if it were too small. Do you currently have a green pool you are trying to clear? If so you need to follow the SLAM Process and keep the pump and filter running 24/7. A sand filter will take the most time to clear the algae debris from a pool after a slam.

Your filter is on the small side and probably would not have trouble keeping a pool clear, however you would benefit from having a larger filter. We recommend pool owners get the largest filter of their choice they can afford to increase filter efficiency. If your test results are good and you just have a lot of wind blown debris in your pool a large cartridge filter should suit your needs.
 

Srbinette

Active member
May 26, 2015
34
Berlin, NH
Pool Size
24000
Surface
Vinyl
Chlorine
Liquid Chlorine
Pool is very blue but cloudy. I had a very green pool about 10 days ago. My test results this morning:
FC 12
CC 0
PH 7.2
TA 80
CYA 35

I plan to add more chlorine in a few minutes to get it back to shock level.
 

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Bperry

Gold Supporter
Aug 20, 2020
788
Knoxville, TN
Pool Size
27000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-60
Pool is very blue but cloudy. I had a very green pool about 10 days ago. My test results this morning:
FC 12
CC 0
PH 7.2
TA 80
CYA 35

I plan to add more chlorine in a few minutes to get it back to shock level.
Click the link zea3 noted and follow that carefully. Shocking the pool is much different process than the SLAM. If the water is green, it’s not the filter that’s the issue, it’s lack of chlorine in the past that allowed it to grow. The SLAM process really works, go for it.
 

zea3

Mod Squad
TFP Expert
LifeTime Supporter
Jul 10, 2009
14,001
Houston, Texas
Round up your CYA level to 40 and use that value to calculate FC for slam level. Sand filters do take a long time to clear a pool, but you can help that process by adding a little DE or celulos pool fiber to the filter to help catch finer debris particles.
 

Srbinette

Active member
May 26, 2015
34
Berlin, NH
Pool Size
24000
Surface
Vinyl
Chlorine
Liquid Chlorine
My pool is very blue. I have been trying to follow the SLAM process as closely as possible. I think I have a lot of dead algae to filter out.
 

Srbinette

Active member
May 26, 2015
34
Berlin, NH
Pool Size
24000
Surface
Vinyl
Chlorine
Liquid Chlorine
Merged threads - TFP Mod
I have been trying to clear the dead algae from my pool for almost three weeks now. This is the second year I have had trouble with a cloudy pool. I never got it clear last summer. I’ve been slamming daily. Chemicals are spot on. I have gone though nearly my entire supply of chlorine trying to get this thing clear. It usually lasts me all summer. There has been 0 CC in my pool for at least two weeks. My pool robot has been collecting sandy debris from the bottom and the pool has a wrap around deck (sand/dirt shouldn’t be coming from outside). My husband changed out the filter sand in the spring but admitted that he was in a hurry and didn’t inspect anything for cracks. At this point I think it’s my filter and am ready to purchase a new one. After doing research, I have believe the filter that the previous owners installed is too small for my pool. I have a 16x32, 24k gallon inground vinyl pool. Looking for suggestions for filter and pump sizing. I have 2” bottom drain and skimmer piping and 1.5” jets. I’m willing to try a sand filter again as I’m used to it. I do have a 1HP super pump and would like to hang on to it if possible but if it’s going to decrease my ability to clear my pool I will buy new. I’m very sick of spending my summer trying to clear a pool instead of enjoying it.
Thanks for all your help.
 
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cowboycasey

Gold Supporter
LifeTime Supporter
TFP Guide
Jul 3, 2013
8,541
Southern OK
Pool Size
15000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
CircuPool SJ-40
The easy and cheap way is to add DE to your filter.. add enough in your skimmer to raise the PSI in your filter 1 PSI... watch the filter because your PSI will raise fast...

If your filter fingers are broke this will do anything to stop sand coming back into the pool..

If you want a new filter get you a cartridge filter, they are really great but they are not cheap... depending on how much debris you get in the pool you can start at 320 and if lots of debris go to a 520 filter.. I have a 320 and clean/empty it once a year... :)

 
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