Hey all. Unsure what to do here.
I am using 12.5% Blue Whale liquid chlorine (from Leslie's). I checked the box, and the manufacturer date is very recent (sometime in mid February 2025), and I store it in a dark closet, so I doubt degradation is an issue.
When calculating on pool math to raise the FC level, my first reading this morning it was at 6.6ppm. I had it calculate a suggestion to get to 10ppm (my CYA is 70). Added 62 fl oz as recommended. Tested 60 minutes later, FC level is only 8.4ppm. This has been consistently an issue since I started testing regularly in February, and it's making it difficult to keep my FC consistent because I don't think I'm ever adding enough.
But I think my pool gallons are correct (17,700). I have the original information from the pool builder, and I don't have this issue with adding other chemicals to the pool. When I added dry stabilizer in February, the suggested amount from pool math to add for 17,700 gallons was pretty spot on for what I got (if not, ended up a hair higher ppm than expected - rather than low, like the chlorine).
To get to the "correct" chlorine ppm by adjusting my gallons, I'd have to essentially nearly double the gallons in my pool, which I just don't think is correct.
Any thoughts or suggestions? Could the chlorine I'm getting just be crappy? TIA!!
I am using 12.5% Blue Whale liquid chlorine (from Leslie's). I checked the box, and the manufacturer date is very recent (sometime in mid February 2025), and I store it in a dark closet, so I doubt degradation is an issue.
When calculating on pool math to raise the FC level, my first reading this morning it was at 6.6ppm. I had it calculate a suggestion to get to 10ppm (my CYA is 70). Added 62 fl oz as recommended. Tested 60 minutes later, FC level is only 8.4ppm. This has been consistently an issue since I started testing regularly in February, and it's making it difficult to keep my FC consistent because I don't think I'm ever adding enough.
But I think my pool gallons are correct (17,700). I have the original information from the pool builder, and I don't have this issue with adding other chemicals to the pool. When I added dry stabilizer in February, the suggested amount from pool math to add for 17,700 gallons was pretty spot on for what I got (if not, ended up a hair higher ppm than expected - rather than low, like the chlorine).
To get to the "correct" chlorine ppm by adjusting my gallons, I'd have to essentially nearly double the gallons in my pool, which I just don't think is correct.
Any thoughts or suggestions? Could the chlorine I'm getting just be crappy? TIA!!
but also hopefully easy to fix. Thank you!
