ok to raise chlorine while gone for a few days

MiguelACA

Silver Supporter
May 12, 2020
144
Houston
We'll be gone for a three days this week, I don't know if I will be able to get anyone to dose the pool with chlorine during that time. I don't have any trichlor pucks. I was thinking of dropping some MA (need to get my TA down a bit) and get my pH to about a 7.0 and get the chlorine to SLAM levels. I lose about half my chlorine every day, but I do have the heater running. Wont be running while I am gone, I'm thinking that should be ok for a few days?
 

MiguelACA

Silver Supporter
May 12, 2020
144
Houston
Increasing your FC is just fine. Make sure to go to the FC/CYA Chart and find your current CYA, then increase the FC as much as you wish up to SLAM level. With cooler water temps, it should hold just fine until you get back.

Excellent, thanks! So my plan is to add enough MA to get my TA where I want it tonight, which will drop my pH down into the low 7s, high 6's. Add chlorine to get me through tonight. Add chlorine to SLAM levels right before leaving tomorrow afternoon. Check levels Saturday evening when I return and adjust whatever is needed?
 

DanF

Silver Supporter
Mar 17, 2019
314
Chandler, AZ
Sounds like a plan, although I personally wouldn't drive pH that low without an aeration plan to bring it back up. Couldn't you wait until your return to lower the pH?
 

MiguelACA

Silver Supporter
May 12, 2020
144
Houston
Sounds like a plan, although I personally wouldn't drive pH that low without an aeration plan to bring it back up. Couldn't you wait until your return to lower the pH?

I've noticed my pH goes up when I use liquid chlorine. I figured the SLAM level chlorine would get the pH up to where it needed for 3 days. I could just turn on my bubblers if I had to. Would pH that low for 3 days cause any issues?
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Since our water temps are getting cooler, I wouldn't lower the pH any more than 7.2. That way when you do increase the FC, it will have a "temporary" effect on raising the pH, but then the pH will later go back to normal once the FC goes down in a few days.
 
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MiguelACA

Silver Supporter
May 12, 2020
144
Houston
Since our water temps are getting cooler, I wouldn't lower the pH any more than 7.2. That way when you do increase the FC, it will have a "temporary" effect on raising the pH, but then the pH will later go back to normal once the FC goes down in a few days.

sounds good

on another note, what does water temperature have to do with pH?
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
on another note, what does water temperature have to do with pH?
As water gets colder, the pH tends to rise a bit. In most cases, as long as your pH is in the recommended ranges of 7.2-7.8, you are fine. In addition, If you use the PoolMath APP, you will see how water temp and pH really impact CSI. CSI is a good tool as well to understand how the water might affect your plaster.
 

MiguelACA

Silver Supporter
May 12, 2020
144
Houston
As water gets colder, the pH tends to rise a bit. In most cases, as long as your pH is in the recommended ranges of 7.2-7.8, you are fine. In addition, If you use the PoolMath APP, you will see how water temp and pH really impact CSI. CSI is a good tool as well to understand how the water might affect your plaster.


ooh ok, got it. Since we got the solar cover, we've been keeping the temp in the 90's for evening swims. Cover and heater will be off while were gone most likely so the temps will for sure go down. Thanks!
 
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