July 7th my pool started looking grey for no reason. Started to take some steps to get it clear. Slowly progressed to worse. Started SLAM. No progress.Took out the ladder 7/14 (previously stored algae in back, however pretty clear this time). No difference the next morning. Yesterday afternoon, husband (reluctantly) did a deep clean to our sand filter. Woke up to clear water this morning 7/16 with just a patch of algae that I’m about to vacuum away.
Can't STOP The ALGAE - Please Help
- Thread starter cdogstu99
- Start date
Hi guys just following up from a few days back. Had managed to keep my FC elevated for several days in a row, and pool does look a bit better but still greenish and cloudy. My FC is now at around 13 with CYA at 90. This comes from a starting shock at around 30. I did let kids swim the last two days and they are still alive which is a positive. 
Do you think I am still battling algae here? Any advice? Thank you
Do you think I am still battling algae here? Any advice? Thank you 
- Jul 17, 2019
- 3,751
- Pool Size
- 13000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Yes, still algae. Please resume the SLAM and do not stop until you pass all 3 criteria to end the SLAM. It goes without saying, but now you have seen firsthand how quickly algae can come back if you do not kill it all. At a CYA of 90, your target FC level is 35 for the SLAM. Your current level is well under that.
- Jul 17, 2019
- 3,751
- Pool Size
- 13000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Yes, stairs, skimmers, lights and drains are known for having areas of no/low circulation and can have hidden algae.
Ok thank you. Restarting. Shocked got stairs out. Gave it a good brush. Vaccum on. Will wait and pray.