I recently moved into a new house that has a pool (18,000 gal/gunite). The previous owners of 10 years used all the pool store chemicals, predominately trichlor tabs for sanitizing. I got my new Taylor test kit to start getting the pool ready to open. It turns out that the CYA is off the charts. On the small taylor test tube, the water level doesn't even get anywhere close to the numbers for the CYA test (100,90,80, etc...). The water level is just above the 1.8 mark on the side of the tube. Is there a test that I can do to determine my actual CYA level? What does my chlorine level need to be in order to be effective? I really don't have the money to drain and refill the pool at this time. What is the best thing that I can do here?
pH: 8.0 (just added 1 gal of Muriatic acid to lower to 7.0). With the plan to aerate to raise the pH and lower TA).
CYA: off the charts
Thanks for the help guys. I love the site. It has been great resource for this new pool owner.