Check in the early morning before the sun hits the pool but only after the pump has been moving the water for 15 minutes. That will give you some idea of how it's holding thus keeping the sun out of the equation.
Opening pool
- Thread starter clem1985
- Start date
Mbehr1983
Well-known member
Usually twice a day. Since I work during the day. One morning one evening. Been officially doing slam since Sunday when I got my taylor test kit. Before that I wasn't really doing it properly.
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Mbehr1983
Well-known member
Log: This morning before the sun: 5/5/21- 6:30am - 19fc - 0ppm drop from last test at 8:30pm 5/4/21 - Added NO Bleach - Will retest around 4-5:30pm - Water still looks cloudy. Will try to brush again today.
Assuming that only 2 things use up FC, is Sun or Organics, Then I assume that if there is NO Drop in FC ppm overnight, then organics would not be a cause of FC loss, but sunlight? Probably need to retest CYA?
Assuming that only 2 things use up FC, is Sun or Organics, Then I assume that if there is NO Drop in FC ppm overnight, then organics would not be a cause of FC loss, but sunlight? Probably need to retest CYA?
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Mbehr1983
Well-known member
Thats great! Have you already read the pool school information? Was the pool already filled? What are the last readings you took?
Mbehr1983
Well-known member
Yes I have I’m about to test. I need to drain lots of rain yesterday. I’m way below but pool
Math isn’t telling me to add all at once
Whether your performing a SLAM or just maintaning FC levels you should add all the Chlorine at a time to reach the level that its telling you. So for example if CYA is 40 and you are just maintaining at 5 ppm FC and you test and the FC is at 2 ppm you would add 2 cups 5 oz of 10% bleach all at once to bring it back to 5ppm.
Whether your performing a SLAM or just maintaning FC levels you should add all the Chlorine at a time to reach the level that its telling you. So for example if CYA is 40 and you are just maintaining at 5 ppm FC and you test and the FC is at 2 ppm you would add 2 cups 5 oz of 10% bleach all at once to bring it back to 5ppm.
Mbehr1983
Well-known member
There are 2 things that consume chlorine. 1 - Sunlight, 2 - Organics (Algae, Leaves etc.). So you will be fighting a losing battle if you are just trying to gradually increase the FC levels. The most important factors to know are the CYA (Stabilizer) level and FC. CYA is what protects the Chlorine from sunlight etc. But it also makes it less efficient. So we need to make sure we have enough FC based off the CYA level at any given time to kill any forms of Algae and Organics etc. to make the pool water stable If you have no or very low CYA you will burn through the Chlorine levels very fast. On the other side of the coin a High CYA level will require a higher FC target level to reach whether SLAM or Maintain.
Mbehr1983
Well-known member
I'm going to be out of town Saturday and until Late sunday. I have been performing SLAM. I do not have anyone to test and add bleach to pool. Should I dose to really high FC on friday evening to possibly hold out until Late Sunday?
Any FC above the cya ratio will disappear fast so your idea is wasteful. I would recommend you use pucks for thar duration to continuously feed chlorine. Whe you get home get'em out of there.
Ok, sounds like a plan thanks. Im thinking hth calcium chloride pucks because I don't want add any stabilizer?
Edit: they are actually trichlor. Do you think the cya level will rise that much in 2 days?
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Log: last test of the night 8:45 pm. Had a 9.5ppm loss in 15hrs. Added chlorine 6:30am and just now at 8:45 5cups. Also brushed, was clearer until brushing which kicked up a lot of stuff.maybe that added to the loss. Will test again in the morning.
Log for the past couple days:
Tuesday - 4.5 ppm loss during the day 6:30am-5:30pm - Dosed back up to 16FC (Test showed 19ppm though? Maybe I added more Chlorine than I thought)
OCLT - 6:30am - 0ppm loss - 19 FC - No Chlorine Added
Wedensday: 6:30am - 8:45pm - 9.5ppm loss - Dosed back up to 16FC
OCLT - 6:30am - 0ppm loss - 16.5 FC - No Chlorine Added
Will test again this evening. Given the 2 nights in a row OCLT test not having any loss, is the Loss I am having strictly sun related? Would the Algae be dead? Pool is still cloudy, brushing yesterday really kicked up stuff. I'm trying to brush and have it all filtered out. I'm thinking I need to run a CYA test again, to reconfirm it.
Tuesday - 4.5 ppm loss during the day 6:30am-5:30pm - Dosed back up to 16FC (Test showed 19ppm though? Maybe I added more Chlorine than I thought)
OCLT - 6:30am - 0ppm loss - 19 FC - No Chlorine Added
Wedensday: 6:30am - 8:45pm - 9.5ppm loss - Dosed back up to 16FC
OCLT - 6:30am - 0ppm loss - 16.5 FC - No Chlorine Added
Will test again this evening. Given the 2 nights in a row OCLT test not having any loss, is the Loss I am having strictly sun related? Would the Algae be dead? Pool is still cloudy, brushing yesterday really kicked up stuff. I'm trying to brush and have it all filtered out. I'm thinking I need to run a CYA test again, to reconfirm it.
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- May 3, 2014
- 62,757
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
A 0 FC loss overnight is a sign the algae is well controlled. So, as the SLAM Process, states, the first sign of a successful SLAM is crystal clear water. So once you have that, then do a OCLT and check your CC.
A CYA test would be wise. Also, doing a SLAM with only test / add twice per day can make for a very long SLAM.
A CYA test would be wise. Also, doing a SLAM with only test / add twice per day can make for a very long SLAM.