Maintaining FC

frogabog

Gold Supporter
LifeTime Supporter
Jul 16, 2010
2,833
Portland, Oregon
Once you've hit the "algae is dead and only needs filtering" point, your chlorine consumption should be reduced considerably. Therefore, maintaining FC at SLAM level shouldn't take much chlorine. The filter will catch it as long as you keep it in suspension with brushing/swimming. As noted above, your pool, your rules. But that's how SLAM works. You gotta keep that algae dead else it will come back to life and bite ya.
 
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TammyGriffin

Well-known member
Apr 23, 2018
273
Hephzibah Ga
Yeah I understand what y'all are saying. The chlorine consumption has come way down after the slam and all the algae is completely dead. Only slight powder settles on bottom of pool. I've been keeping it stirred up so filter would catch it. I think I'm just losing so much chlorine now to the sun. It's been really hot here and I have zero shade on pool from the time sun comes up til it goes down
 

IceShadow

Gold Supporter
Jun 8, 2019
1,072
Milwaukee, WI
The more FC you have in the pool, the more you will lose to the sun.

My recommendation is to test it once daily, preferably in the afternoon. Then figure out what you need to add to get to the top of the range of your CYA per the chart. Add that. Next day, test again, add again. See how much your PPM loss is each day. If it's over 4 then you might want to bump up your CYA by 10 ppm and raise up to the new target value at the top of the new target range. The daily loss should go down with more CYA.
 
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TammyGriffin

Well-known member
Apr 23, 2018
273
Hephzibah Ga
The more FC you have in the pool, the more you will lose to the sun.

My recommendation is to test it once daily, preferably in the afternoon. Then figure out what you need to add to get to the top of the range of your CYA per the chart. Add that. Next day, test again, add again. See how much your PPM loss is each day. If it's over 4 then you might want to bump up your CYA by 10 ppm and raise up to the new target value at the top of the new target range. The daily loss should go down with more CYA.
Very good explanation. Thank you so much. You've been great about answering my question 😁
 

TammyGriffin

Well-known member
Apr 23, 2018
273
Hephzibah Ga
Update..ok i think I'm getting the hang of this. I stopped over shooting my chlorine. Stopped testing twice a day. I ve only been testing in the late afternoon now. And my chlorine loss each day has come down to 3.7 only about 1 gallon of each a day. So I'm ok with that. A lot better. So I assume that when I was over shooting the chlorine it was just wasting.
 

TammyGriffin

Well-known member
Apr 23, 2018
273
Hephzibah Ga
Hey guys! Hate to keep bothering everyone. But I have one more question. Is there a better time of day to run filter? Or does it make any difference? And how long should i run filter a day for my size pool? Thanks guys! Yall are great!
 

TammyGriffin

Well-known member
Apr 23, 2018
273
Hephzibah Ga
See

Thanks I've been running 24/7. Because I was slamming and letting filter clean cloudiness out. But now I'm crystal clear I need to back off run time. But I think maybe I should back off slowly until I know what is sufficient. I going to set it for 12 hours first. And go from there. I was just wondering on time of day or night was best? Or it doesn't make any difference?
 

Mr Bruce

TFP Guide
Mar 24, 2014
2,438
Greenville, SC
Doesn't matter. If you only have a single speed pump you could run it at night if electricity is cheaper. I used to run from 1-5p so that the pool would be (relatively) skimmed when I came home. Obviously it needs to be running when you test and adjust so you can take that into account as well.
 
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gonfishin

Gold Supporter
Jun 13, 2017
345
Rochester, MN
If you want to cool the water and your overnight temps are lowish, running at night may help to cool the water. If your electricity has different rate periods, you might want to run when $/kw is lowest. Otherwise, it likely doesn’t much matter
 
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