SLAM AND FC levels

[LooLooPoolNoob]

So I've been checking my chlorine levels through my slam, and I've been noticing that about 2 hours or so after I bump it up it actually is higher than my slam level. CYA is 30 so I'm slamming at 12. At about 10:00 my level was 11, so using pool math I added the recommended dosage for the size of my pool. Tested at about 1:30 and it's at 12.5.

I'm wondering if I'm overestimating my pool volume. We were told that it was 4 ft in the shallow end, and 8 ft in the deep end. We measured the length and width of the pool and it's 35x17. I'm wondering if maybe I'm not getting accurate info from the pool people. And so my volume is actually smaller than what they're telling me.

Any ideas on how I can manually measure how deep my pool is?

 

[mknauss]

35 by 17 at 5.5 feet depth average is 24500 gallons. Try using 25000 gallons.

 

[CrystalRiver]

You could always go out there with a tape measure.

 

[LooLooPoolNoob]

True, I don't know why I didn't think of that. Lol The little clippy bit on the bottom of the tape measure wouldn't hurt the liner if it pushed into the bottom of the pool right?

 

[CrystalRiver]

Don't get violent with it or anything, and run your finger over it first to be sure it's not particularly sharp for some reason. But I've measured my vinyl pool without incident.