Did you then add 5 drops of R-0011L?I have a quality test kit. My CH is 0 I guess because the instruction said after I add the 20 drops of reagent it supposed to turn red. It never turned red it stayed clear. So does that mean 0 CH?
I would deep clean that filter before I tried to make it another season. Backwash works but it is not 100% effective and you have had a REAL MESS in your filter. There is an article in Pool School that shows you how to deep clean.When I just back washed this came out for about five minutes
Hey there Ben I notice you're using the K-1005 test kit. That kit is missing an important element you need: the FAS-DPD chlorine tester which measures FC and CC up to 50ppm.
I'd suggest just picking that missing part up and your kit will be comparable to the K-2006 kit. It is important to have that one additional element, seriously
This FAS/DPD Test will test Free Chlorine up to 50+ppm with an accuracy of .5ppm. (.2ppm if you really need to be precise) Additionally, it contains the R-0003 reagent so you can test for combined chloramines. Neither the test for free chlorine or for combined chloramines is found in the...tftestkits.net