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Had to wait through sunday to get test kit, I always order a day too late. It was worth the wait i got the fas-dpd test kit ( add on) from tftestkits. Woked like a charm. I will NEVER use my dpd chlorine test again. I checked with new test kit FC 13.5 ( which was supposed to be 9 using my old...

i honestly think i was with the pool before i drained. since i had just the dip strips that measured TC, and i used alot of di/trichlor shock and floating tablet dispenser that added alot of cya. I wasn't able to get correct reading, and i used that yellow packet ( algae killer) and not...

agh one more thing to buy. got the k-2005 thinking it was the one, saw the dpd on it but no. just ordered fas/dpd single test kit to add to my existing one :) theys say two day shipping! could i be getting false cc readings from DPD test kit? or just non-reliable readings?

no cya was reading 0 which technically could be anything below 30 since test stops at 30 i added i believe 20oz by volume of cya stabalizer in a nylon hanging in skimmer. turns out it was too much so i took it out next A.M. half was gone and reading now is 60ppm.

oh and on last bout before i drained the pool the FC did HOLD at 25ppm for two days without me adding anything to it, untill it rained, but CC did not change or come down. If Fc shock levels did hold why would CC not come down. I could not read that high since 1.8ml times five is the most dilute...

ok i just started using TFP calculator and site. Thanks i finally understand most of the going on's of my pool now.. kinda. I am having trouble with CC. Lets start at the begining. I have a 5300gal vinyl pool 15' by 4' depth. yes an intex. I had multiple times of algae this year. Last year NONE...