Waiting on UPS to bring my new sand filter!!!

Looking at your signature line, I note you have the 15' x 48" same as mine. By using PoolMath, and carefully measuring your bleach etc, I'm sure you will find that your water is closer to 4500 gallons. Measure your water depth, and recalculate using that.
 
Charlie, I usually use 4750(I took the middle of 4500 and 5000) for PoolMath. I've been trying to keep the water level below the seam at the top as much as possible, but last year and this year so far we've had enough rain that I'm constantly trying to drain to keep it there. 1 cup of 8.25 bleach usually raises right around 1.1 FC. I'll take time tonight and actually measure tonight!

Edited to add, I've never actually only had to add 1 cup of bleach! LOL I usually go through about 32oz a day. But that usually gets me pretty close to 4.5 FC increase.
 
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