Is it possible that algae could be stuck in my filter? It has not been cleaned for many years. Could that cause chlorine to drop so fast? As I don't see anything else where it could be hiding.
Pool Chlorine Issue
- Thread starter g3lo
- Start date
Thank you pooldv,
I have no idea how much more I should keep SLAMing for. I know I am waiting for the OCLT to get to 1PPM drop at most, however I feel like I will not get there. Something keeps eating it away. I drop around 10-15 PPM a day when holding it at 24.
I have no idea how much more I should keep SLAMing for. I know I am waiting for the OCLT to get to 1PPM drop at most, however I feel like I will not get there. Something keeps eating it away. I drop around 10-15 PPM a day when holding it at 24.
FC is lost as a percentage to sunlight (UV light). So if you're in maintenance mode and your FC is at 6 ppm, you might lose 40% of your FC to sunlight each day. That would be 2.4 ppm. If you're maintaining 24 ppm for a SLAM, you're losing 9.6 ppm at that same 40% rate. Just to sunlight. Couple that with still having some algae present and it's easy to see double digit FC losses during a SLAM on a warm, sunny day. Keep at it and hope for some cloudy days to lessen the FC loss.
Hi! I never knew that, that provides me with some
confidence. Today was cold and cloudy, and SURPRISE SURPRISE, FC didn't drop that much. Maybe 1.5ppm from
the early morning to noon and another 2ppm from noon to 5pm. I added avout
750ml of chlorine twice to keep it
at 24.
if I recall correctly, the OCLT last night to today was maybe 1.5-1.8ppm. Hopefully today is the last day.
you think if I maintain the minimum 4 to target 7 daily, I should get no algae blooms? And drops to sunlight would be within 2-3 range at that point? Why does
sunlight burn more FC with more FC in it than with less? I would think the opposite would hold true?
confidence. Today was cold and cloudy, and SURPRISE SURPRISE, FC didn't drop that much. Maybe 1.5ppm from
the early morning to noon and another 2ppm from noon to 5pm. I added avout
750ml of chlorine twice to keep it
at 24.
if I recall correctly, the OCLT last night to today was maybe 1.5-1.8ppm. Hopefully today is the last day.
you think if I maintain the minimum 4 to target 7 daily, I should get no algae blooms? And drops to sunlight would be within 2-3 range at that point? Why does
sunlight burn more FC with more FC in it than with less? I would think the opposite would hold true?
- Mar 24, 2014
- 2,455
- Pool Size
- 32000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool SJ-55
There is no independent FC ppm to shoot for, it's based on your CYA.
It's a percentage, like JVTrain said. 25% of 10 (2.5) is more than a 25% of 5 (1.25).
It's a percentage, like JVTrain said. 25% of 10 (2.5) is more than a 25% of 5 (1.25).
Thank you! That reassures me I should be okay! I thought if I am losing about 10PPM a day in morning, maybe when I go to maintenance mode I will go to 0. I guess that is not the case. Well we will see what happens at maintenance! 
Hi so I did another OCLT and I got 2-3ppm loss. This is the third day I'm losing about the same FC nightly. Could it be because it is below 60 F at night?
thanks
thanks
- Mar 24, 2014
- 2,455
- Pool Size
- 32000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool SJ-55
No, it is because there is something in your water eating FC.
May I ask how often you are testing and adding chlorine?
May I ask how often you are testing and adding chlorine?
I test 3 times a day and vacuum once a day. I scrubbed every edge I could think of, I can't find a place there could be anything hiding
- Mar 24, 2014
- 2,455
- Pool Size
- 32000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool SJ-55
Hmm . . . No idea guess I'll have to drain and refill maybe the chlorine don't get rid of whatever is in there.
You are going to drain a 23k pool because it is taking a bit longer to kill everything off?
Algae doesn't float around much, it sticks to things and grows. So if that is your problem, a drain and refill isn't going to help much.
Algae doesn't float around much, it sticks to things and grows. So if that is your problem, a drain and refill isn't going to help much.
So your saying that a drain nor keeping slam level will help at this point? I have to find the sticky stuff in order to fix my issue?
Okay, maybe theirs an issue with my testing.
i checked the water at night near the shallow end at elbows length water sample FC - 28 with magnetic stirrer. In morning 25.
i tried taking another test immediately after in morning in deepend and without stirrer, I got FC 29-30. Than I tried stirrer with sample from deepend, FC - 27. I wonder if my FC was higher yesterday in deepend than 28. So depends where the sample is from, it could be viewed I lost 1-3 ppm on the OCLT.
could you advise you if I should redo it with sample all from deepend without stirrer? Or, it doesn't matter? I find maybe theirs some bacteria on hands and when the magnet is dropped it could be skewing the tests. Otherwise I'm not sure.
i checked the water at night near the shallow end at elbows length water sample FC - 28 with magnetic stirrer. In morning 25.
i tried taking another test immediately after in morning in deepend and without stirrer, I got FC 29-30. Than I tried stirrer with sample from deepend, FC - 27. I wonder if my FC was higher yesterday in deepend than 28. So depends where the sample is from, it could be viewed I lost 1-3 ppm on the OCLT.
could you advise you if I should redo it with sample all from deepend without stirrer? Or, it doesn't matter? I find maybe theirs some bacteria on hands and when the magnet is dropped it could be skewing the tests. Otherwise I'm not sure.
What matters is consistency. Doing the test the same way each time. The Speed Stir makes your mixing more consistent and results more reliable when the test is done quickly. Stick to the speed stir and the same methods each time.