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# Swimming/paddling pool treatment

Hi,
We're putting up the pool for the kids and I'm trying to work out the volume so we can treat it with chlorine but I've totally confused myself and would like a second opinion.
It's a round, 10 foot pool and is 70cm deep. Trying to remember back to school and using pi x r squared, I've used the calculation and come up with 5000 litres (approx)
Is this correct?
Thanks in advance.

8 Comments

is 10 feet the diameter or circumference?

Original Poster

Diameter

We have a pool, 6 feet wide, 12 feet long, varies from 1 meter to 3 meters in depth, and it only uses 2 tablets, possibly everyday or when they run out. - Depends on the condition of the water, we have a water testing kit for this so even if you messed it up, once you test the water it will instantly tell you.

Guessing you don't need hardly anything in it

i get 5100 litres

Yes, your calculation sounds correct.

10ft= 3.048m

Area= pi* diameter squared / 4
= 7.3m2

Area * depth= 7.3*0.7= 5.1 cubic metres= 5100litres

1000litres= 1 cubic metre

Therefore ~5000litres as you said. :thumbsup:

5104 i lub google

Original Poster

Excellent, thank you all. I'll dish out some rep when I get on the pc.

Original Poster

5 cubic metres (5000 litres) only needs 9 grams of 55% chlorine granules as a daily treatment.
(1.8 grams/m3)
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