Hi all! New to this group and having trouble with algae on the walls. One whole wall seems to be worse than the other, but luckily it is not the whole pool. We have had the pool a little over a year and never had algae or cloudy water, just battled high CYA last summer. I have a Taylor kit and did a 30ppm shock Sunday night, if I did it right. I used 5 gallons liquid chlorine, and made sure my pH was good first. I am still brushing off some algae daily. My levels last night were: FC/TC level says 10, pH 7.8, CYA 60 and TA 90. I just ordered the FAS/DPD addition for my Taylor kit. Hope to have it soon. The water is clear, just not sparkling. Any suggestions? I maintenance regularly, look at the pool daily, empty baskets and skim top surface daily, brush the pool and use the robot weekly. We keep 3 pucks of chlorine disks in the feeder. TIA!
Algae on Walls
- Thread starter dcarey72
- Start date
I had the same problem as you a few years ago...algae would only form on the shady walls of the pool. The only way to truly rid yourself of it is to follow the SLAM process. You'll need time...it will take at least a few days and require lots of liquid chlorine and testing. Don't try to rush it.
Also, the chlorine pucks will add CYA to your water. If you keep using them, CYA will get too high and make sanitizing your pool harder and harder. If/when you do the SLAM, make sure you stop using the pucks and only use liquid chlorine during the SLAM process.
- Jun 22, 2014
- 47,840
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Welcome to TFP! 
For now, just add about 5 ppm of chlorine per day until you get the FAS-DPD. Then you can increase (and maintain) the FC to 24 (your SLAM level) and follow that SLAM Process page. Enjoy the forum. 
For now, just add about 5 ppm of chlorine per day until you get the FAS-DPD. Then you can increase (and maintain) the FC to 24 (your SLAM level) and follow that SLAM Process page. Enjoy the forum. 
- Jul 17, 2019
- 3,714
- Pool Size
- 13000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
And just to be clear, the SLAM is a process of raising your FC up to SLAM level and keeping it there for several days through frequent testing and replenishing chlorine.
A one time shock may knock back the algae but does not completely kill it all like the SLAM process.
A one time shock may knock back the algae but does not completely kill it all like the SLAM process.
Do you suggest not using the pucks at all and only use liquid form now on, even after the SLAM? If I do, will I need to add CYA at some point?
Thank you!Welcome to TFP!
- Jun 24, 2021
- 7,504
- Pool Size
- 30000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60
Yes.
Yes. What is your current CYA?
Safe to swim when FC is more than min and SLAM level or less, and you can see the bottom of the pool. Link-->FC/CYA Levels
You wouldn't want to go much higher than this. Your SLAM chlorine level would be 24ppm. The CYA will slowly drop over the coming months and eventually you would need to add more. If you have pucks left over, they can be good for trips when you'll be away for a few days. Using them every once in awhile is manageable, the CYA just rises quickly if you use pucks continuously.