New user / question about FC test with the K2006

[Pannhead-Pool]

First let me start by saying as a first time pool owner that the Poolsolutions.com site has been a HUGE help for me to get my solid green swamp pool to being able to see the bottom and have what appears to be balanced water! Thank you!

I believe as a result of running Tri-chlor tabs and shock all last season (that’s what the previous home owner ran and left for me) the stabilizer count is way high CYA @ > 100, I figure about 110-120 based on CYA test in K2006 kit. So I’m running a higher FC count to match the high CYA.

So this morning I test the FC using the 10ml -0.5 count test and it takes 17 drops, so I figure 8.5 ppm FC, I run the CC test, the sample barely turns red and takes just 1drop to clear so I figure 0.5 CC

I then rerun the test at the 25ml -0.2 count hoping to get better resolution on the CC results and this time it takes 58 counts to clear! That’s 11.6 ppm !? The CC again just 1 drop so I figure 0.2 CC.

So the question is what result should I rely on? I did rinse the comparator in pool water between test. Should I average them? Any thoughts would be appreciated.

I have a 27’ above ground, vinyl liner, 17000 gallon pool running a Pentair 1.5 SPL HP pump and a Waterway Proclean PCCF-125 cartridge filter

Today’s readings are
FC 8.5-11.6?
CC 0.2
PH 7.6
ALK 120
CH 60
CYA > 100, possibly 110-120

Thank you for your time
Bob