Quote Originally Posted by Nevets View Post
Got it. Just finished reading some of the thread posted at TFP. Looks like an avenue that I will want to go into. Just need to get the right calculations for my pool though. It is rectangular (kind of) and at the deep end it is 11 feet wide. At the shallow end it is 17 feet wide not counting the steps (three). The total length is 28 feet and at the shallow end, the depth is 3 feet and the deep end is 7 feet however the deep corners are very rounded. This is why it is so hard to calculate the total gallons for this pool. I am pretty sure though that when I had it re-finished I checked the water meter before and after I filled the pool and it came in at about 10,300 gal or there abouts. Wish I would have written it down now

Thanks for your help and the PM.
You can often get a good 'guestimate' of your gallonage by seeing the results of adding a chemical. For example, lets assume your pool is 1100 gallons, then adding 6.75 lbs of calcium chloride dihydrate (flake calcium, not the pellets) should raise your CH by 50 ppm up to 350 ppm. This will give you a starting point to see if you are in the ballpark. It is does not go as high then your pool is bigger, if it goes higher your pool is smaller. Remember it's a pool and not rocket science so don't obsess over it once you get the ballpark figure.

If that does not give you enough precision I do have another method of determine the volume of a pool chemically but it is a bit more involved so try this first.