FresnoRick

I have a problem with my cyanuric acid level being too high. I understand that ideal levels should be between 25 - 50 ppm. Upon opening my pool for the summer, I discovered with a test kit that the level of cyanuric acid (stabilizer) in my pool was 100ppm. I found out from local pool suppliers that the normal reason for this is that prolonged use of stabilized 3" tablets (which contain c.a.), will result in high levels of residual c.a., after the chlorine has dissapated. They also said the normal fix is to drain some? water out of the pool and refill with fresh water. I drained about 2' of water out of an 18' x 36' pool and then refilled. The level of c.a. was then 80ppm. Not wanting to drain all that water out again, I reasoned that if I now used non-stabilized liquid chlorine for a period of time, some more of the c a would be diluted as I refilled the pool from normal evaporation. It has been about a month now and the c a level has gone back up to 100! Where did I go wrong? Does anybody have any experience with this? Please help. I'm losing my confidence in the local pool suppliers. Thank you.