Help With SLAM Please!

mknauss

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May 3, 2014
44,318
Laughlin, NV
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Metals will tend to show when you have higher levels of FC and/or higher pH.

Not saying it is, but that vibrant green with multiple days of SLAM level FC is a sign that it could be metals. It is very rare for a pool with algae to not be blue and cloudy after 36-48 hours at SLAM level FC.
 

huskerfan

Active member
Jul 12, 2016
44
Lincoln, Nebraska
Pool Size
14000
Surface
Vinyl
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Liquid Chlorine
Well, just left the pool store and they showed zero iron and zero copper. Phosphates were at 52. They showed my FC to be 13 which is what I measured it at as well before coming to the store. Any ideas?
 

mknauss

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May 3, 2014
44,318
Laughlin, NV
Pool Size
6000
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Pentair Intellichlor IC-40
Well. No. Stay at SLAM. Just very odd -------
 

mknauss

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May 3, 2014
44,318
Laughlin, NV
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Not if you are confident of your CYA level.
 

huskerfan

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Jul 12, 2016
44
Lincoln, Nebraska
Pool Size
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Finally starting to see some progress! Been continuing the SLAM. FC at 1000 today was 12. Water is slightly clearer and I can see a ring of dead algae in the middle of the pool.
 

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huskerfan

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Jul 12, 2016
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Lincoln, Nebraska
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That color change is a little more reassuring, but we'll see. Hat's-off to you for hanging in there. :salut:
Finally! Just backwashed at 1000 prior to adding more liquid bleach, and the dirty water was quite green, so that was reassuring as well. Seemed like it got a lot of stuff out of the water.
 

Pv2

LifeTime Supporter
Aug 14, 2013
1,082
south east Arizona
Finally starting to see some progress! Been continuing the SLAM. FC at 1000 today was 12. Water is slightly clearer and I can see a ring of dead algae in the middle of the pool.
moving very slowly you should try to vacuum some of that out to waste. don't run it through your filter. remember to check levels when you replace water.
 
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huskerfan

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Jul 12, 2016
44
Lincoln, Nebraska
Pool Size
14000
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Vinyl
Chlorine
Liquid Chlorine
More progress!!! Vacuumed to waste twice and need to do it again tonight. Brushed after vacuuming to stir up all the smaller stuff I didn’t get with the vacuum and then would backwash next day after vacuuming to waste and it’s working well!
 

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huskerfan

Active member
Jul 12, 2016
44
Lincoln, Nebraska
Pool Size
14000
Surface
Vinyl
Chlorine
Liquid Chlorine
Yes indeed! Thanks for all your guys help!! I will keep you updated on the progress. I have not tried the overnight chlorine loss test yet but will soon.
 

Newdude

Gold Supporter
TFP Guide
Jun 16, 2019
11,173
NY
So pretty soon it will lose the green tinge and go cloudy/milky. When that happens you’ve killed most/all of the algae and it shifts from a chemistry fight to a filter out all the crud fight. You keep the FC up just for good measure. Some times you may brush or stir old algae up that needs to be killed, but for the most part, the FC holds very well from there on out.

Shift at that point to babysit the filter. It will need cleaning when the PSI rises 25%. I forget what you have but if it’s sand you can add DE to speed it along. You have to stay close though because you’ll turbocharge the filter and it will need rinsing quick. This stage tends to drag on for most but don’t get discouraged, be happy that you aren’t blowing through chlorine.

Also, if the FC demand comes back a bit, do not get discouraged there either. Be happy that there was more to kill and you killed it. So see the big picture when it’s testing your patience. Progress is progress, albeit slow at times. :)
 
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huskerfan

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Jul 12, 2016
44
Lincoln, Nebraska
Pool Size
14000
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Vinyl
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Sounds good! Hopefully we can get a few more hot weekends in before the cold weather settles in. What’s the process for closing up the pool for the winter? Obviously I’ve done it many times before, but I’m wondering what you guys recommend?
 

huskerfan

Active member
Jul 12, 2016
44
Lincoln, Nebraska
Pool Size
14000
Surface
Vinyl
Chlorine
Liquid Chlorine
Well guys I think I am home free now. Here is how the pool looked yesterday after work prior to me vacuuming up the little bit of debris in the middle. I passed the OCLT this morning as well. So now I can allow my FC to drift down to 3-5 ppm correct?
 

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Texas Splash

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full
 
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Texas Splash

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Yes, you can now allow the FC to slowly fall. Although keep in mind your winter closing schedule. Often times owners elevate the FC level a week or so before closing as one final effort to ensure there is minimal organic material in the water prior to shut-down.
 
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