cloudy pool water

lucyyan

Member
Jul 14, 2023
15
Winnipeg Manitoba
just opened our pool last week. I didn't add chlorine till a few days later. Water was clear and I thought because it was still pretty cold out side it wouldn't need chlorine (we live in Winnipeg Manitoba).

CYA 50
TA 80
PH 7.2
Cal <300
CC 0

this was the reading once pool was opened the water was clear, i didn't add chlorine bc it was still pretty cold out, we opened it really early this year bc we had to install a new pump motor.

then a few days later i noticed it was getting a bit cloudy so I added two jugs of chlorine. (3.6L each 10.3%) I didn't slam it because in the past if its just a bit cloudy adding a bottle or two of chlorine would do the trick

a day later the water was still cloudy so I think my husband added another jug, FC an hour later was 7

I retested the water 10 hrs later and the readings were:

FC 4.5
CYA 50
TA 100
PH 7.8-8 hard to tell the color df between these two (can PH go above 8?)
cal 300 or slightly less
CC 0.5

SLAM for me should be FC of 20

I didn't have enough Chlorine on hand so I only added two more jugs of chlorine (3.6 L each 10.3%) tonight
FC a few hours later was 15 or 15.5 (around 1030pm)
I will test it again in the morning before sunrise to see the overnight FC loss

If its more than 1 I will do the SLAM?

Any suggestion about the PH? should I lower it before SLAM if its needed and should I worry about the TA at 100? I read in the forum PH can fluctuate and some ppl said to leave it at 8 too and not bother adjusting?
i know the app says to lower PH to 7 or 7.2 which will lower TA but by how much? how much df does this make on the TA
it also said I would need to aerate the pool after lowering Ph to 7 or 7.2......how would I do that? I couldn't find a lot of info on this

Lucy
 
Follow the SLAM Process.

How did your pH and TA rise between the two tests posted above? After you finish SLAMming, just worry about keeping pH somewhere in the 7s, and your TA will find it's own balance. Don't fixate on forcing it to a certain number.
 
So I shouldnt' worry about getting my PH down before slamming?
Good morning. Yes, the pH should be adjust to about 7.2 before you increase the FC to SLAM level. Once the FC hit 10 or above, the pH test gets wonky. :crazy:
 
the first test was done at the pool place but they are usually pretty accurate, SEcond test I did on my own.
Unless you added something to drastically change pH and TA between those tests, then either you or the pool store was wrong. I'm better on the pool store.
So I shouldnt' worry about getting my PH down before slamming?
Read through the whole SLAM Process a couple of times. It's not complicated, but there are a few subtleties:

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