Short-cycling DE filter

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Durs517

New member
May 29, 2022
4
New York
I am having trouble with my DE filter. On Saturday I took my DE filter apart and cleaned the grids with a hose. When I did this there was a white grainy substance on top of the assembly (could be DE?). After cleaning the filter I put it back together and added DE through the skimmer. Yesterday my return jets were very weak. The pump is running at 3,000 and the filter pressure is good. The skimmer baskets and pump basket are all clear. The pool water is cloudy. Any ideas what could be causing this? Could there be excess DE in the pool that is causing the filter to clog quickly? That would explain the cloudy water as well.

Thanks!
 
Jimrahbe said:
517,

To be clear.. You do not have a filter issue, you have a chemical issue, and that is why you have algae.

I suggest that you perform what we call a SLAM.



Thanks,

Jim R.
Click to expand...

Thank you both.

I added 3 gal of liquid shock on Sunday and have been running the pump 24/7. The water is not green at all, just cloudy.

My last water test results (before I added shock and chemicals) are as follows:

FC: 0.0
pH: 7.6
TA: 40
CH: 110
CYA: 0
Salt: 2600

I’ve also added conditioner to increase CYA.
 
517, some additional notes to consider:
- Your profile and signature pool info are blank, so we know nothing about your pool and equipment info. Please be sure to populate that info.
- Which test kit are you using? Include that in your signature too.
- Antitime a pool's FC level drops to zero, there is a very high chance you have algae. That fact, coupled with cloudy water, basically confirm it.
- No amount of filter grid cleaning or pump speed will resolve the issue.

Once algae grows (cloudy water or green, it doesn't matter), you have to have the proper amount of elevated chlorine balanced to the current CYA level to kill the algae and clear the water. See our FC/CYA Levels for an example of what I mean. That is why accurate testing is so important. If you have a SWG, it will not sustain a SLAM Process or be able to maintain the required FC level.

We are going to need more info about your pool and testing methods to give you accurate advice.
 
Texas Splash said:
517, some additional notes to consider:
- Your profile and signature pool info are blank, so we know nothing about your pool and equipment info. Please be sure to populate that info.
- Which test kit are you using? Include that in your signature too.
- Antitime a pool's FC level drops to zero, there is a very high chance you have algae. That fact, coupled with cloudy water, basically confirm it.
- No amount of filter grid cleaning or pump speed will resolve the issue.

Once algae grows (cloudy water or green, it doesn't matter), you have to have the proper amount of elevated chlorine balanced to the current CYA level to kill the algae and clear the water. See our FC/CYA Levels for an example of what I mean. That is why accurate testing is so important. If you have a SWG, it will not sustain a SLAM Process or be able to maintain the required FC level.

We are going to need more info about your pool and testing methods to give you accurate advice.
Click to expand...
I updated my signature. Retested the water tonight.

FC: .8
pH: 7.0
TA: 50
CH: 110
CYA: 50
Salt: 2400
 
Your FC is exceptionally low. You should add dune liquid chlorine right away if you have it available. Based on your last couple FC results and cloudy water, you should go right into a SLAM Process by taking the FC up to 20 which is your SLAM level. Maintain that level until you pass all 3 SLAM criteria. Follow that article and you should do well. If you have any questions let us know.
 
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