If I ask it how much to add, to reach a target FC, it doesn't list anything that obviously fits. I could infer by calculating it's comparison to bleach, but not only am I unsure that would be correct, I'd probably get it wrong anyway.
I bought these 10L 10.5% liquid chlorine jugs. What do I tell PoolMath?
- Thread starter DeptOfMeteors
- Start date
Flying Tivo
TFP Guide
- Jan 24, 2017
- 3,100
- Pool Size
- 7500
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Deb04
LifeTime Supporter
- Jul 12, 2008
- 779
- Pool Size
- 19000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
- Mar 5, 2020
- 3,221
- Pool Size
- 66000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Astral Viron V35
The "What size of bleach jugs do you use?" feature is just for your convenience to tell you to add x number of jugs, rather than y litres. I assume the values in the dropdown make sense in imperial units and just got automatically calculated into metric units, where they look a bit arbitrary. It doesn't really matter what you enter here, the calculated volume in ml and liters will still be correct.
I'm wondering about that. I told it that I wanted to raise the FC from 10.5ppm to 24ppm, so it recommended I put in 10L of 10.5%. So you can imagine my surprise when a couple of hours after I put in an entire jug, it tested at 40ppm!
- Jun 1, 2018
- 16,027
- Pool Size
- 26000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
That addition should have increased your fc by 14ppm in 23000 gal /87000 liter pool volume .
Are u using a 10ml sample & 80 drops = 40ppm ?
Cuz 40 drops = 20ppm which is more in line with the dose
Yes, I dropped 80x in a 10mL vial before it turned clear.
I'm starting to think that I've overrated the size of my pool. It would explain why I overshot my target FC twice and my CYA once (but it doesn't explain why my CYA jumped 50% over a few days). It would have to be about half the size I thought it was to fully explain a lot of my results though.
I'm starting to think that I've overrated the size of my pool. It would explain why I overshot my target FC twice and my CYA once (but it doesn't explain why my CYA jumped 50% over a few days). It would have to be about half the size I thought it was to fully explain a lot of my results though.
- Jun 1, 2018
- 16,027
- Pool Size
- 26000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
U can use these two calculators to get a better idea of your pool volume
(@the bottom of this page)
& here
www.pentair.com
U can also try this
www.troublefreepool.com
(@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
Pool Volume Calculator
Check out Pentair's easy-to-use pool volume calculator to calculate the volume of your swimming pool water by choosing the shape, dimensions and depth.
A Chemical Way of Calculating Pool Volume
There is a way to use pool water chemistry to calculate pool water volume without using the traditional geometric calculations. The geometric formulas are fine for pools that are traditionally shaped. However, when pools do not fall into these convenient shapes, a chemical method can be used...
www.troublefreepool.com
I think I finally figured out why my tests seems to keep overshooting my targets. I think I've vastly overestimated the size of my pool. I told PoolMath it has a capacity of 87,000L (23,000galUS). 'Don't know where I got that figure from. But I just took a tape measure to my pool and this is what I found, with the water at the typical level:
Edges: 14' x 28'
Shallow: 2'9"
Deep end: This one's a bit difficult, because the sides curve a lot, making the flat part pretty small. But it's deepest part is around: 6'
If I guess my average depth is 4', then How Many Litres of Water are in my Pool? | Pool Supplies Canada puts it at 44,691L (11,886gal).
Now if I use PoolMath, then I put the chlorine addition figures from last night:
Concentration: 10.5%
Volume: 10L
Starting FC: 10.5ppm
Ending (a couple of hours later, maybe 10pm) FC: 40ppm!
That puts my volume at around 36,000L (9500galUS)
Now, I'm thinking the safest thing to do at this point is tell PoolMath that my pool is 36,000L, my current FC is 15.5ppm (it is) and that my target is 24ppm (it is), in which case it will tell me to add 2.9L of my 10.5% liquid chlorine. Can anyone offer more finely-tuned advice?
BTW, that "10L" addition is based on what the vendor told me: it's a jug w/10L of 10.5% chlorine. I'm going to be eye-balling 2.9L so that means a pretty wide confidence interval for the FC reading I'm going to be making tonight.
Edges: 14' x 28'
Shallow: 2'9"
Deep end: This one's a bit difficult, because the sides curve a lot, making the flat part pretty small. But it's deepest part is around: 6'
If I guess my average depth is 4', then How Many Litres of Water are in my Pool? | Pool Supplies Canada puts it at 44,691L (11,886gal).
Now if I use PoolMath, then I put the chlorine addition figures from last night:
Concentration: 10.5%
Volume: 10L
Starting FC: 10.5ppm
Ending (a couple of hours later, maybe 10pm) FC: 40ppm!
That puts my volume at around 36,000L (9500galUS)
Now, I'm thinking the safest thing to do at this point is tell PoolMath that my pool is 36,000L, my current FC is 15.5ppm (it is) and that my target is 24ppm (it is), in which case it will tell me to add 2.9L of my 10.5% liquid chlorine. Can anyone offer more finely-tuned advice?
BTW, that "10L" addition is based on what the vendor told me: it's a jug w/10L of 10.5% chlorine. I'm going to be eye-balling 2.9L so that means a pretty wide confidence interval for the FC reading I'm going to be making tonight.