You need to get your CYA up to at least 30. You are losing most of your FC to sunlight.
July and have yet to swim!
- Thread starter Jaylakay
- Start date
- Jun 8, 2019
- 4,574
- Pool Size
- 20000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Put another 10ppm of CYA in with the sock method. Test as often as you can, up to once an hour and keep getting back up to 12ppm of FC. 
What's that? Drain it and start from scratch?Put another 10ppm of CYA in with the sock method. Test as often as you can, up to once an hour and keep getting back up to 12ppm of FC.
Joking... sort of lol
Alright, I'm all over this. Off to conquer the swamp monster.
- Jun 8, 2019
- 4,574
- Pool Size
- 20000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Low CYA would explain a rapid drop off of FC. But if you keep the FC up by testing and adding often, too low of CYA wouldn’t stop it from killing algae too.
Higher CYA will let more of it go to organics instead of UV though. Just test often and keep adding back to 12.
LoneWolfArcher
Bronze Supporter
I would say take the vacuum out. You need to brush a lot. You want to break up all of the algae so the chlorine can kill it. When I opened my pool this spring it was a swamp. I was brushing twice a day.
LoneWolfArcher
Bronze Supporter
My point was that the vacuum could get in the way of the brushing. Plus the vacuum can also become a holder of live algae.
Depending on the cost of your water it may be cheaper to drain some of the water. You do NOT want to drain all of it. You would need to leave about a foot to keep the liner from moving. I will let you do the cost comparison-bleach vs water.
The bleach WILL clear it over time. The more you test it and bring the FC level up to SLAM level the faster it will clear. If you work during the day it can still work.............test in the morning, test when you get home, test at dinner time, test before bed. That is 4 times with brushing thrown in at least once.
You go this!!
The bleach WILL clear it over time. The more you test it and bring the FC level up to SLAM level the faster it will clear. If you work during the day it can still work.............test in the morning, test when you get home, test at dinner time, test before bed. That is 4 times with brushing thrown in at least once.
You go this!!
This is where I'm at currently. FC has been checked every 1 to 2 hours since I last posted (with the exception of overnight of course) and being brought back to 12. I'm averaging a drop to about 9 during that time. CYA is at 35. PH is at 7.8.
My pressure was lacking so I cleaned off the filter, picture attached. Why is it so green still? I've also attached pictures of the pool water looking straight down. I think it's a lighter green... maybe?
There shouldn't be anything for the algae to hide in; stairs are out, I'm vacuum brushing and then removing it.
Thoughts?
My pressure was lacking so I cleaned off the filter, picture attached. Why is it so green still? I've also attached pictures of the pool water looking straight down. I think it's a lighter green... maybe?
There shouldn't be anything for the algae to hide in; stairs are out, I'm vacuum brushing and then removing it.
Thoughts?
Attachments
- Jun 8, 2019
- 4,574
- Pool Size
- 20000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
CYA can’t be measured between the lines. Round up and assume you have CYA 40 - up to 16ppm for the SLAM.
With a cya of 35 you will round up to 40, which brings FC level up to 16 for slam
- May 3, 2014
- 58,384
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Your CYA is 40 (round up). Your SLAM level FC is 16 ppm at that CYA.
As you tested your pH with FC below 10 ppm, you can add acid to lower the pH to 7.2. You need the TA data for that.
As you tested your pH with FC below 10 ppm, you can add acid to lower the pH to 7.2. You need the TA data for that.
It is trending to blue now! This is where a picture is very helpful! Keep it up! It is working!
Thank you everyone! I'm relieved to hear it should be at 16 because maybe now I'll see quicker results.
I'm going to check all my levels including TA now, get my PH down and chlorine up and hopefully see a difference soon.
Thanks again. I'll be back with pictures.
I'm going to check all my levels including TA now, get my PH down and chlorine up and hopefully see a difference soon.
Thanks again. I'll be back with pictures.
LoneWolfArcher
Bronze Supporter
Keep it up, it's almost licked! If recommended cleaning that filter regularly. I was doing every day when I was slamming from swamp to clear.
Here is a link to some green to clean threads: Recovering my old inspirational links This will show you how just about every SLAM goes. You may recognize some of the colors you have already gone through!
- Jun 8, 2019
- 4,574
- Pool Size
- 20000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
This thread is the ultimate example of what makes TFP so great. Moderators are checking in giving advice people are being so encouraging and you have a green swamp pool turning into a crystal clear blue oasis.
Simply awesome. Thanks TFP and best of luck finishing your SLAM I will be watching this one closely.
Simply awesome. Thanks TFP and best of luck finishing your SLAM I will be watching this one closely.