Pool opened to no CYA. You told me to raise it. Easy enough. Five pounds of CYA and a week later, and the water is only slightly cloudy on my TF100 test kit, so basically no CYA. Chlorine has held at 5 most of the week and is down to 4 today with no CC. Pool has a solar bubble cover on all the time. Logic says to add the rest of the bucket, or three more pounds. But I keep remembering all the water we drained last spring trying to lower the CYA! Thaks for sharing your infinite knowledge with us non-Mensa candidates.