Have had a pool since 1986 and over the years learned a lot and continue to learn . Use the BBB method has been a ble
Chlorine Level Drops Quickly
- Thread starter gfritz1
- Start date
- Jun 22, 2014
- 52,017
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
To help with your chlorine loss, how about we start with a full set of water test results either from your TF-100/Series test kit or Taylor K-2006C? That would be step #1.
Also, did you perform a SLAM Process this year when you opened?
Also, did you perform a SLAM Process this year when you opened?
Use the BBB method and pool owner since 1986. First time ever on opening my CYA level was 25 and had difficulty getting a chlorine level . Readings today were FC 1.5 ,Hardness 210,Alk 100 ,PH 7.4 and CYA 30-35 . Water is perfectly clear . I try to hold 3-4 chlorine . Is my CYA level too low ? Why cant maintain chlorine .
- Jun 24, 2021
- 15,903
- Pool Size
- 29000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
Could be one of two thing.
Your CYA is lower, so FC consumption will be higher. We are nearing summer solstice, so the sun is eating up the most chlorine during the year in the next 30 days. Add 10ppm of CYA and see what improvement you get.
You could also have unseen algae. To confirm, do this test tonight...Link-->Overnight Chlorine Loss Test
Your CYA is lower, so FC consumption will be higher. We are nearing summer solstice, so the sun is eating up the most chlorine during the year in the next 30 days. Add 10ppm of CYA and see what improvement you get.
You could also have unseen algae. To confirm, do this test tonight...Link-->Overnight Chlorine Loss Test
Ok update . 1 Did the Overnight Chlorine Loss Test 5 ppm at 9 pm 4 ppm 6:00 AM so appears ok and no need to slam ?
2. Agree CYA at 30 is on low side so looked to add .None in this small rural Pa Town .Ordered Amazon so a week out .
3. Test chlorine daily and always add the required amount of liquid .Never check after ! Notice all my Liquid Chlorine bottles are very dirty
as purchase at local Walmart .Yesterday took a closer look and they are all OLD INVENTORY from 2023. So I know the chlorine is no
longer 10% but unsure exactly how low it is???? So by not testing after the assumption is that the level of chlorine when adding was
lower than expected per chart and thus maybe the loss has not been as great ! Does this make sense ? New chlorine picked up
yesterday is 2024 and clean bottles so hopefully old inventory out of system .
Question do I need to shock or slam on a regular schedule as think read not required
What level of cya is recommended - 40?
2. Agree CYA at 30 is on low side so looked to add .None in this small rural Pa Town .Ordered Amazon so a week out .
3. Test chlorine daily and always add the required amount of liquid .Never check after ! Notice all my Liquid Chlorine bottles are very dirty
as purchase at local Walmart .Yesterday took a closer look and they are all OLD INVENTORY from 2023. So I know the chlorine is no
longer 10% but unsure exactly how low it is???? So by not testing after the assumption is that the level of chlorine when adding was
lower than expected per chart and thus maybe the loss has not been as great ! Does this make sense ? New chlorine picked up
yesterday is 2024 and clean bottles so hopefully old inventory out of system .
Question do I need to shock or slam on a regular schedule as think read not required
What level of cya is recommended - 40?
- Jun 24, 2021
- 15,903
- Pool Size
- 29000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
Nope, not needed if you keep your FC up in range for your CYA. Link-->FC/CYA Levels
30-60 is just fine in a liquid chlorine based pool.
What is the ideal CYA level? It is too low, and the sun eats chlorine too high, and the level has to be higher.
- Jun 24, 2021
- 15,903
- Pool Size
- 29000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
Yes, your FC demand (how much FC you need each day) increases when CYA is lower. As you raise CYA, FC demand is lower, but you need to keep your FC higher, because the amount of HOCl (the stuff in chlorine that kills stuff) in the pool changes when you change CYA. At levels above about 70, it become hard to slam the pool, so we recommend 30-60 or liquid chlorine pool. Above 80, it is really hard to keep enough FC to kill stuff.
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