I have been using the K-1000 and TF-100 for weekly testing and decided to take a sample to my pool retailer who is knowledgeable about pools and chemicals. Their results were not even close to what I have been getting with my kit. My numbers FC 2 Alk 70 cal. 240. Ph 7.8 and CYA. 52. Compared to FC 0. Alk 12. Cal 800+. Ph 7.8. And CYA 50.
I went ahead and adjusted the alkalinity based on the 70 to a target of 90 and will retest in a few hours. Should I disregard their readings altogether? I am using new reagents except for the calcium, but have noticed dime to quarter size raised spots that could be calcium deposits.
Pool is clear and no algae problems all season. Have a liquidator and in line tab chlorinator set at 1. Use poly quat 60 and clarifier weekly and pool size is 35k gallons.