CYA is crazy high, with photos


Gold Supporter
TFP Guide
Jul 21, 2013
Northern NJ
Follow Step 8 in the CYA test if you show CYA 90 or above. Dilute the test sample 50/50 with tap water ...

If your CYA level is 90 or higher, repeat the test adjusting the procedure as follows:
  1. Fill the mixing bottle to the lower mark with pool water.
  2. Continue filling the mixing bottle to the upper mark with tap water.
  3. Shake briefly to mix.
  4. Pour off half of the contents of the mixing bottle, so it is again filled to the lower mark.
  5. Continue the test normally from step 2, but multiply the final result by two.