2 week slam, still cloudy

[ejbuffett]

Alright, I was hoping not to have to make this post… as I have tried to follow all of the recommendations closely, but here’s the story.

I built a deck around my pool this spring and during the process the pump was unplugged to be moved and hard piped (for about 3.5 weeks). During that span I had a crazy algae bloom (there was already a small amount of algae from winter).

Fast foward to today… I have completed 2 weeks of slam method (as closely as I could) and my water doesn’t seem to want to clear. It is still slightly cloudy. I have ran the pump 24/7 for these two weeks.

Current test results using TFP PRO.

FC: 12
CC: 0.5
Ph: 7.5
TA: 70
CYA: 35

Over night drop test is 0.5

I have vacuumed and brushed regularly. And have been using skimmer socks. Backwash and rinse daily.

There doesn’t appear to be any more algae, so is it just a matter of continuing to run the pump until it clears? Or does anyone have any other suggestions?

Pics of deck progress for funsies.

 

[PoolStored]

First your CYA is 40, always round up to the next 10.
SLAM target is 16.
The more often you test FC and replace (up to every 2 hours) the better.

There doesn’t appear to be any more algae, so is it just a matter of continuing to run the pump until it clears? Or does anyone have any other suggestions?

Sand filters take the longest to clear the pool...you are on the right path.

 

[ejbuffett]

First your CYA is 40, always round up to the next 10.
SLAM target is 16.
The more often you test FC and replace (up to every 2 hours) the better.


Sand filters take the longest to clear the pool...you are on the right path.

Ahhh good to know about the CYA. Thanks for that info! So maybe I should bump up my slam target level. I’ve been shooting for 14 based on the “35” cya.

 

[JJ_Tex]

A couple of things:

1. Your FC target should be 16 since you round up your CYA (35 = 40).
2. You backwash daily, which sounds good but many users report that their sand filters actually filter better when slighly dirty, so only backwash when your pressure rises 25% from the clean pressure.
3. You can also add DE to a sand filter at the very last stages of a SLAM to help speed up the filtering.

Add DE to a Sand Filter

A clean pool filter will increase the efficiency of your pool! ... your filter are to backwash it, clean the manifolds and grids, and add new DE.

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