SLAM Assistance Needed

dielseman

Well-known member
Jul 1, 2017
151
GA
Hi there,

I had a big algae bloom due to getting a water feature fixed and overflow from the water feature into the pool.

I'm now in day 4 of the slam process and the water is still very hazy. Aside from running the pool pump 24/7, I have been testing chemicals daily, vacuuming with the robot, brushing, and skimming.

Chemicals:
FC: 5
PH: 7.2
CYA: 50
TA: 100

Overnight FC loss was about 3 PPM.

What are the thoughts? Do I just need to keep running the pump 24/7? Alternatively, I run the filter daily for 8 hours. Is the only way to clear this up by running the pump continuously?

Thank you,
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2014
33,644
Texas, San Antonio/Marion, South-Central Area
Pool Size
17888
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-45 Plus
The most significant item I see is that your FC is way too low, and not following the basic principle of the SLAM Process. According to the FC/CYA Chart, with a CYA of 50, your SLAM FC should be "20". That's the FC you need to maintain as much as possible while you do all the other tasks on the SLAM Process page. Very critical.
 

dielseman

Well-known member
Jul 1, 2017
151
GA
The most significant item I see is that your FC is way too low, and not following the basic principle of the SLAM Process. According to the FC/CYA Chart, with a CYA of 50, your SLAM FC should be "20". That's the FC you need to maintain as much as possible while you do all the other tasks on the SLAM Process page. Very critical.
I'm using liquid chlorine and adding 32 ounces at a time of 10% Hypo. I've already added 2 gallons since starting. Do I need to increase the to 20 PPM? I must've missed that.
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2014
33,644
Texas, San Antonio/Marion, South-Central Area
Pool Size
17888
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-45 Plus
Do I need to increase the to 20 PPM?
Yes. You need to maintain that elevated FC level of 20 as much as possible until you pass all 3 SLAM criteria. Liquid chlorine would be best for this as it could take a while and cal-hypo will drive your CH higher and higher.
 

dielseman

Well-known member
Jul 1, 2017
151
GA
Yes. You need to maintain that elevated FC level of 20 as much as possible until you pass all 3 SLAM criteria. Liquid chlorine would be best for this as it could take a while and cal-hypo will drive your CH higher and higher.
So I plug in target FC on pool math as 20. It says, I need to add 138 oz of 10% bleach. Is that correct? And is it best to do this all at once? Or wait until night?
 

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bigevilgrape

Well-known member
Mar 5, 2016
105
Central CT
So I plug in target FC on pool math as 20. It says, I need to add 138 oz of 10% bleach. Is that correct? And is it best to do this all at once? Or wait until night?
Yes to running the Pump 24/7 until you pass all the criteria. You should add chlorine as needed to keep it at SLAM level for your CYA. Keeping the chlorine up in that high zone is whats going to kill the alge. Test, add chlorine brush repeat.
 
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mknauss

Mod Squad
TFP Expert
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May 3, 2014
44,426
Laughlin, NV
Pool Size
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Surface
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Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Does it matter if I add the chlorine now or during the night?
Now. The M in SLAM is maintain. Raise your FC to SLAM level and maintain it by testing FC and adding more liquid chlorine to get back to SLAM level. At least twice a day. Preferably more often than that.
 

mknauss

Mod Squad
TFP Expert
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May 3, 2014
44,426
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
I added 138 ounces of bleach to this to 20 PPM and have the pump running. Brushed as well.

Thank you
Great. Test the FC in a few hours and add liquid chlorine to raise back to SLAM level FC. Keep going until you meet the three criteria described in the SLAM Process
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,426
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
So just the spa spillover? Does it spillover with the filter pump? Your signature does not show a spa, etc.
 

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