We have a newly installed IG pool and I just got the test results from the first water sample. I was a little surprised to see the results are not really ideal since the water seems sparkling clear from my perspective. My test kit is the TF-100 and these are the results....
FC - Free Chlorine = 15 ppm
CC - Combined Chlorine = 2.5 ppm
pH = 7.0 estimated between 6.8 & 7.2 on chart from basic kit
TA - Total Alkalinity = 70
CH - Calcium Hardness = 375 ppm
CYA - Cyanuric Acid (stabilizer) = 20
So the chlorine is way high and the CYA and PH are low. I intend to add some borax for the PH.
First a little history on how we got here. Initially we were steered towards a chlorine alternative product called "Advanced Blue" from the pool store and we did add about 3 cups of this to the pool and also some shock. Shortly after I decided this was going to be an expensive solution and decided to change to chlorine. We have been using stabilized chlorine 3" pucks in a chlorine feeder. The feeder was set at a setting of three, then we had the water tested by the pool store and they said to increase the chlorine feed to five. I have now set the feed rate down to two since the FC tested at 15 ppm.
Also from reading on this forum I now understand that Trichlor pucks are going to create a CYA problem at some point if I continue to use them so I will likely switch to liquid chlorine down the road. I just bought a 50 lb supply of these pucks so I think I will use them for a while. Since my CYA test was at 20 I have a ways to go before that reading is a problem. What I'm not sure of is how quickly the CYA is going to climb while using the Trichlor pucks. Does anyone have any advice for me ?