Cloudy Water, Day 7 of Slam

drano0127

New member
Jul 26, 2020
2
Chicago
Been a lurker for a while now, but confused on getting chemistry right this spring. I switched from the cheepo pump and cartridge filter to a real pump and 250# sand filter this year. 18’ round intex.
I’ve been sustaining slam levels for 7 full days now. On day 2 the water turned blue from green. I’ve been vacuuming and brushing since day 2 as well. I’m no longer getting much of the bottom.

FC is 16 and I’ve kept it there
CC fluctuates from 0.5 to 0.0
CYA is 30, was at 40 before backwashing on day 5

Any ideas? I’m considering DE in the skimmer but somewhat confused as to why the cloudiness hasnt cleared up.
 

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cowboycasey

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Jul 3, 2013
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Southern OK
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Welcome to TFP :)

A sand filter is very easy but they take the longest to clear a pool from a green monster to clear.. Putting a cup of DE in the skimmer will help very much.. Remember you have to watch the filter because your pressure will go up fast because you will be trapping all that dead algae... Once the pressure raises 25% backwash the filter and put another cup of DE in the skimmer...

Repeat until clear.. :)
 
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drano0127

New member
Jul 26, 2020
2
Chicago
For info of anyone else who may be having this issue and watching.... I have been adding DE as described in the “Adding DE To sand filter” thread.

I’m now 4 cycles into it and I can actually see the bottom now. I’ll be continuing tomorrow with another cycle.
 
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cowboycasey

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Southern OK
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I am very happy it is working for you :)
 

Pool_Medic

In The Industry
Apr 1, 2018
1,531
Bangor Maine
If you don’t follow slam procedures you can play rope a dope with algae all summer long. Those dips below 40% of your cya reading simply give the algae a breather.
 

Texas Splash

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Jun 22, 2014
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The tail end of a SLAM Process is always the hardest. Hang in there and stay patient. Remember to clean every bit of surface area and maintain the FC as steady as you can. If you have a ladder, it should be removed and cleaned thoroughly. Often times pulling some of it apart is best to get into all the poles and steps. Looks like the backwashes are lowering your CYA. That's fine for now (CYA of 30), but don't let the CYA fall any lower. As the CYA goes up or down, remember to keep the FC balanced to the correct number as noted on the FC/CYA Chart. Progress is good. :goodjob:

full
 

wireform

Silver Supporter
In The Industry
Aug 15, 2017
2,788
Spring Valley, NY
I did an ABG last year for a first timer and they we excited when they said the bottom was visible. It actually was far from that but compared to where it was before I got there this was considered clear. Took another week and the rest was history.
 
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