Moblaine's pool

[moblaine]

Gotcha. Chart is now filled in.
Just did my "within 2 hours of sunrise" test. Results were 1.0 FC and 0.5 CC. I liked your advice from the other day about maybe not worrying about CC any more and it has been low, around 0.5 or 1.0 ppm. But clearly something adverse is going on if FC fell from 7.5 to 1.0 ppm during the 12 overnight hours. My #1 concern at this point is to maintain sufficient FC to avoid algae. In prior years when I ran my Frog in-line feeder all the way open, I would have had higher FC readings than I do now (seems to hover between 0.4 to 1.0 ppm and only goes higher if I pour in 12.5% LC or 6% bleach). My fear is that without pouring in additional liquids, I am not maintaining a high enough FC level and not sure what I can do about that without resorting to nightly shocking. Driving my family crazy with this!

[moblaine]

Just wanted to update with good news. I did another 4 gallons of 12.5% liquid chlorine the other night and tested one hour later. Finally, I got a high chlorine reading (like 22 ppm). Within an hour of sunrise the next morning, I hadn't lost any FC. That was 3 days ago and I continue to get a chlorine reading so am very excited (today's FC is 3.5 ppm and CC is 0.5 ppm). It seems like I finally broke through and got rid of whatever was keeping me from keeping chlorine in the pool. Altogether, it took over 44 gallons of 12.5% LC this spring but the pool looks great, we're all swimming and life is good. Thanks for all the advice.

[PoolDoc]

Thanks for the update.

44 gallons of 12.5% -- that's about 160 ppm of chlorine in your pool, or more. Actually, you were on the list to contact. You reported 25K gallons, but also reported that you had a 16x32 IG pool, with a 3' shallow end and a 8' deep end. If those measurements are correct, your actual pool volume is either approximately 15,500 gallons OR 17,700 gallons, depending on whether the 3' & 8' measurements were POOL depth (deck to floor) or water depth. So, you may have added as much as 340 ppm FC!!!

Let's hope this winter doesn't reproduce the conditions that produced so many cases of ammonia-pooping bacteria this past winter.

[moblaine]

Oops, should be 16 x 36. Shallow end us 16 x 12 with depth of 3' and deep end is 16 x 24 but with slants from shallow end and on all sides forming a "hopper".