Now I begin. All the ezpool tabs are out of the chlorinator. I returned the Sustain Chlorinating Tabs (Calcium hypochlorite, Calcium Chlorate, Calcium Carbonate, Calcium Hydroxide, Magnesium) to the pool store. Bought the Taylor K2006 FAS-DPD kit, 6 gallons of liquid bleach, 16 lbs of baking soda, and 8 lbs of borax. Read pools school materials yesterday. Spent evening re-reading test booklet that came with the kit. Paid particular attention to corrections for false results and fading end points caused by high level of CYA (90) and copper (.4ppm). Did this mornings test using standards recommended on the kit and then did adjusted readings for corrections. Question. How do you feel about the using adjusted readings when determining my saturation index value, calcium hardness, and total alkalinity? Following were my numbers:
Free Chlorine 6.0.
Combined Chlorine .4
PH 7.7
Total Alkalinity110ppm
value when adjusted for high CyA 75.3
Calcium Hardness 200 to a purple end point
Test when 6 drops reagent used prior to starting test to correct for copper, 220 shift to blue/purple, 240 full shift to blue
Cya 90
Double checked value by using half tap water to pool water. Marker seriously fading 45 and disappears at 40........doubled value as directed , guess I am somewhere around 85-90.
When determining Saturation index, using original values from testing, .1 is my index at 90 degrees. When using adjusted values, my reading is .0 if I use the adjusted ALKc.
Have not drained water yet. Decided to wait till I had test results. From what I can see, my combined chlorine is .2 too high. Shock will drop my alkalinity and ph. Adding calcium chloride will raise my
calcium hardness by 50 ppm at 10-12 lbs and drop my saturation index to .0 if I get close to 300ppm.
At some point I need to add liquid chlorine. According to the CYA index my minimum free chlorine reading should be 6.5 to 7. What are your recommendations? Thank you for helping. I am in over my head. Have not used a slide rule since 1970. Really don't trust myself. Please advise if I should have started a new thread. Figured it would make more sense if I stayed on this one.