Your numbers all look good. Just test your water every evening and add enough bleach to bring your cl level back up to 6. (With cya of 40, you want to keep your chlorine between 3-6.) Shock the pool to 15 anytime you have a CC reading greater than 0.5. Keep your ph 7.4-7.6 (but anywhere between 7.2 - 7.8 is OK.) We say alk between 80-125 but actually for a vinyl pool, 140 is fine. Your cya level is perfect at 40 and don't worry about the calcium level in a vinyl pool. Everything looks great - except the temp! As the water warms up, keep doing what you are doing and make sure you run your pump 10-12 hours per day and you should continue to have clear water. Happy swimming!
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