Sand filter quckly clogs

[SQRLPWR]

Hi, im dealing with a sand filter that clogs after 1 hour.
Normal PSI is 10.
When it clogs, the PSI is 0
We had a LOT of pollen as I was opening.
I think that's pollen in the photo, and the pump is just mixing it up in the pool making it very cloudy.
The photo is after 1 or 2 days of no filtering or pump running.
Normal?
Any thoughts?
Best way to remove the pollen? I've tried clarifyer.
Thanks in advance.

 

[ajw22]

Do a Overnight Chlorine Loss Test. Chances are you have an algae problem clogging your filter.

What test kit do you have?

I suggest you read ABCs of Pool Water Chemistry

 

[SQRLPWR]

Thanks.

My HTH Spa test strips are showing these numbers consistently for the last few weeks;
CH 250
PH 7.8
ALK 80
FC 10
I'll try an overnight chlorine test, thanks

 

[sktn77a]

im dealing with a sand filter that clogs after 1 hour.
Normal PSI is 10.
When it clogs, the PSI is 0

Odd, that the pressure goes DOWN when it clogs(?)

 

[SQRLPWR]

Yes 100% pressure drops to 0 psi.

I did an overnight chlorine test with a chemical test, and it remained at 3.

I just had the pool filled and whilst filling a had the filter on Waste and cleared out all of the pollen/algae, and part way i had to switch to Backwash because of the same 0 PSI problem.

Pool looks a lot cleaner now, so I'm running it on Filter today to see if it happens again.

Could the pump be getting weak? It's a Pentair.

 

[sktn77a]

Something's not right but without being there, or more pics of the plumbing and equipment, it's difficult to say what.

 

[borjis]

Does your pressure gauge easily return to zero when you turn it off? Or is it sticky?

 

[SQRLPWR]

Pressure gauge is new 1 week ago, along with the valve.
I've since backwashed most of the pollen out and the pump is only reducing to 50% of it's main starting output after a few hours of running now.
If I do a short backwash and rinse, it's back to 100% again.
I'm hoping this will clear itself soon.

 

[SQRLPWR]

Weirdly this problem resolved itself after a few days of filter->clog->backwash->rinse and repeat.
Thanks everyone