Hey thanks for the reply. Yeah I was unsure of whether or not to fill the pool first. You mentioned bleach, bleach won't harm the vinyl liner will it? I am not entirely sure of the size of the pool, using Google earth I was able to get a rough estimate of the size with the ruler tool. It seems to be 12' X 36'. I was told the depth is 10' and 3', this could be incorrect. I unfortunately can't pop over and measure anything. By my calculations that makes the volume about 25000 gallons, I would say that is the most it could be. Thanks for the tip on the test kit, I will probably be jumping over there and purchasing one. I can't however see your signature, just did a search for it.

Thanks again.