# Thread: Determining Number of Gallons

1. ## Determining Number of Gallons

Renting a house in which the owners know nothing about the pool, including its gallons. I've been using a rough estimate of 16,000 suggested by another forum user, but I am having trouble getting my chemicals straight. The final readings, after adding chemicals according to PoolMath, are always higher ( i.e. FC should of raised to 5 but was at 6 or 7/ pH should of raised to 7.6 but it's 7.8 or 8)

I have a free form pool with three different depths and a spillover spa. My question is, what is the best way to get an accurate amount of gallons and to determine the length and width of the pool?

Thanks, Kelsey

2. ## Re: Determining Number of Gallons

The easy way is to adjust your volume based on the discrepancies you've already noticed, maybe going 500 gallons at a time.

If you want to do it the "hard" way, here you go: A Chemical Way of Calculating Pool Volume

3. ## Re: Determining Number of Gallons

That's what I figured and have been doing. I believe I'm getting closer as the discrepancies are getting smaller and smaller.

4. ## Re: Determining Number of Gallons

Originally Posted by ChelseaSoccer
Renting a house in which the owners know nothing about the pool, including its gallons. I've been using a rough estimate of 16,000 suggested by another forum user, but I am having trouble getting my chemicals straight. The final readings, after adding chemicals according to PoolMath, are always higher ( i.e. FC should of raised to 5 but was at 6 or 7/ pH should of raised to 7.6 but it's 7.8 or 8)

I have a free form pool with three different depths and a spillover spa. My question is, what is the best way to get an accurate amount of gallons and to determine the length and width of the pool?

Thanks, Kelsey

Sent from my iPhone using Tapatalk
If Fcu goes to 6 plus instead of 5, I'd drop 1000 gal. 6 is 20 percent over 5 so decrease of 15-20 percent should be safe initially. Then500 next time if needed

5. ## Re: Determining Number of Gallons

Sorry. 2000 initially would be about 16 prrcent

6. ## Re: Determining Number of Gallons

Thanks for the feedback. I'll give it a go tomorrow and let you know.

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