Helping an elderly neighbor couple with their pool. Their pool guy was just fired because he couldn't get the pool clear after about 3 months of problems. He had been using chlorine pucks for years so the CYA is very high. He also added a bunch of stuff, copper algaecide, as a final attempt to clear it up. The pool was a deep green color, and was getting that way for a number of weeks. At the end of today's SLAM it is still green but a little lighter.
Vinyl liner
In-ground
24,000 gal
Chlorine via pucks
The day before the SLAM the water tested:
FC 0
Ph 7.2
TA 70
CH 100
CYA 100 or more
I replaced 25% of the water to try to lower CYA, but it still tested 90. I added acid to lower Ph to 7 to help avoid staining from copper algaecide. I decided to use 35 as the target shock, but at 10:30 am I upped it to 45 after a number of cycles because the CYA could be 100 or higher.
Today I started the SLAM and here are today's details.
6/16
7:30 am
FC 14, PoolMath states add 1048 oz liquid chlorine to reach target of 35
8:00 am
FC 20, add 748 oz
8:30
FC 25, add 499 oz
9:00
FC 28, add 349 oz
9:30
FC 30, add 249 oz
10:00
FC 28, add 349 oz
10:30
FC 47, decided to change target shock to 45, no chlorine added
11:30
FC 42, add 150 oz
12:30 pm
FC 45, none added
2:00 pm
FC 44, add 50 oz
3:45 pm
FC 41, add 200 oz
6:15 pm
FC 45, none added
8:30
FC 45, none added.
I'll check levels first thing in the morning. I'm concerned about the CYA being so high and the target shock at 45. I can maintain that level if I need to. Let me know what you think. Thanks for following along. Remember to NOT look at my pool specs when suggesting. This is for my neighbor and their specs are listed above.
Thanks
Sean
Vinyl liner
In-ground
24,000 gal
Chlorine via pucks
The day before the SLAM the water tested:
FC 0
Ph 7.2
TA 70
CH 100
CYA 100 or more
I replaced 25% of the water to try to lower CYA, but it still tested 90. I added acid to lower Ph to 7 to help avoid staining from copper algaecide. I decided to use 35 as the target shock, but at 10:30 am I upped it to 45 after a number of cycles because the CYA could be 100 or higher.
Today I started the SLAM and here are today's details.
6/16
7:30 am
FC 14, PoolMath states add 1048 oz liquid chlorine to reach target of 35
8:00 am
FC 20, add 748 oz
8:30
FC 25, add 499 oz
9:00
FC 28, add 349 oz
9:30
FC 30, add 249 oz
10:00
FC 28, add 349 oz
10:30
FC 47, decided to change target shock to 45, no chlorine added
11:30
FC 42, add 150 oz
12:30 pm
FC 45, none added
2:00 pm
FC 44, add 50 oz
3:45 pm
FC 41, add 200 oz
6:15 pm
FC 45, none added
8:30
FC 45, none added.
I'll check levels first thing in the morning. I'm concerned about the CYA being so high and the target shock at 45. I can maintain that level if I need to. Let me know what you think. Thanks for following along. Remember to NOT look at my pool specs when suggesting. This is for my neighbor and their specs are listed above.
Thanks
Sean