Is this safe for swimming for toddlers as I continue to backwash and add new water a little at a time?
My CYA is 100
- Thread starter smiller3709
- Start date
- Jul 21, 2013
- 65,367
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Welcome to TFP.
Post a full set of test results from your test kit in the format:
FC
CC
pH
TA
CH
CYA
What does the water look like? Can you see the bottom of the pool?
With CYA of 100 have you done the diluted CYA test?
For CYA > 90ppm, repeat the test adjusting the procedure as follows:
If you need to dilute the pool water further then apply these ratios:[7]
Note that when doing a diluted test not only do you multiply the range of the test you multiply the error rate of the test, so results are a ballpark - not an absolute.
See CYA Testing for tips in how to read the test results.
Post a full set of test results from your test kit in the format:
FC
CC
pH
TA
CH
CYA
What does the water look like? Can you see the bottom of the pool?
With CYA of 100 have you done the diluted CYA test?
For CYA > 90ppm, repeat the test adjusting the procedure as follows:
- Fill the mixing bottle to the lower mark (15 ml line) with pool water.
- Continue filling the mixing bottle to the upper mark (30 ml line) with tap water.
- Shake briefly to mix.
- Pour off half of the contents of the mixing bottle, so it is again filled to the lower mark (15 ml line).
- Continue the test normally from adding R-0013, but multiply the final result by two.
If you need to dilute the pool water further then apply these ratios:[7]
| Pool water | Tap or distilled water | Multiply result by |
| 1 | 1 | 2 |
| 1 | 2 | 3 |
| 1 | 4 | 5 |
Note that when doing a diluted test not only do you multiply the range of the test you multiply the error rate of the test, so results are a ballpark - not an absolute.
See CYA Testing for tips in how to read the test results.
- Jun 1, 2018
- 16,027
- Pool Size
- 26000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
It is safe to swim so long as all these are true:
*Fc is between min & slam level for your cya
See—> FC/CYA Levels
* ph is in the 7’s
AND
* you can see the bottom of the deep end for swimmer safety
That said- how large is your pool?
Small drains and refills take more water than one larger exchange & it may take a while to get cya to a reasonable level.
Exchanging 1/2 of your water will reduce cya by 50%
*Fc is between min & slam level for your cya
See—> FC/CYA Levels
* ph is in the 7’s
AND
* you can see the bottom of the deep end for swimmer safety
That said- how large is your pool?
Small drains and refills take more water than one larger exchange & it may take a while to get cya to a reasonable level.
Exchanging 1/2 of your water will reduce cya by 50%
FC 7.0
CC
pH 7.2
TA 90
CH 375
CYA 100
What does the water look like? Can you see the bottom of the pool?
With CYA of 100 have you done the diluted CYA test?
FC 7.0
CC 0
pH 7.2
TA 90
CH 375
CYA 100
What does the water look like? Can you see the bottom of the pool? Water is clear but getting a little brownish algae
With CYA of 100 have you done the diluted CYA test? No I have not
- Jun 1, 2018
- 16,027
- Pool Size
- 26000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
Follow Aj’s instructions in post #2 on doing the diluted cya test & report back.
This will help confirm your cya level so you know just how much water to exchange.
Visible algae requires the
SLAM Process.
That is impractical to do at such high cya levels.
Until you get the water exchanged & can do the slam process you’ll want to keep the fc at 8ppm or above to keep it sanitary for swimmers - use liquid chlorine
& PoolMath for calculating amounts.
Also, if you’re unsure of your pool volume there’s a calculator at the bottom of this page
When you get a chance please fill out your signature it helps make sure you get accurate advice.
www.google.com
This will help confirm your cya level so you know just how much water to exchange.
Visible algae requires the
SLAM Process.
That is impractical to do at such high cya levels.
Until you get the water exchanged & can do the slam process you’ll want to keep the fc at 8ppm or above to keep it sanitary for swimmers - use liquid chlorine
& PoolMath for calculating amounts.
Also, if you’re unsure of your pool volume there’s a calculator at the bottom of this page
PoolMath
Discover the calculator behind the perfect pool, PoolMath. Dealing with pools has allowed TFP to become the original authors of the best calculator on the net.
www.troublefreepool.com
When you get a chance please fill out your signature it helps make sure you get accurate advice.
Create Your Signature - Further Reading
www.google.com
- Jul 21, 2013
- 65,367
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Okay so your CYA is around 100.
You need to get your CYA down to 30-40 by draining 60% to 70% of the water.
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