Re: FAS-DPD and Speedstir -- strange results
Sorry I never replied back to this thread. Our pool developed a pretty serious leak around the time of my last post and we ended up losing (and replacing) a lot of water. As a result, the CYA level came way down (to about 40 ppm), and I brought the FC level down with it. After this drop in FC, I was no longer able to reproduce the differing results between the SpeedStir and the manual stir methods.
25,000 gallon IG pool using BBB method
Re: FAS-DPD and Speedstir -- strange results
Thanks for the update tpspeier. (I think Chem geek thought I was the OP). So maybe the differing results are related to the absolute CYA or FC levels or their ratios?
Your original CYA was 110 - 120 and now is 40. Original FC was 8.5 or 11 (without or with speedstir respectively). What's you current FC at CYA = 40?
In-ground gunite 16 x 30 13,000 gal. Full screen enclosure. 120 sq ft. Filter cartridge, 1-1/2 HP pump. Master Pools In-floor cleaner. Taylor K-2006.
Re: FAS-DPD and Speedstir -- strange results
Prior to shutting down the pool for the winter, I was keeping the FC around 5.
25,000 gallon IG pool using BBB method
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