WOW! With a cya reading of 30, a chlorine reading of 26 is way too high. Don't add any more chlorine until that drops below 12 ppm. Also, instead of using baking soda to raise ph, use 20 Mule Team Borax as it will not raise your alk with the ph. Your alk doesn't need to be any higher. You do not need to put in any hardness treatment with a vinyl liner. Run your pump 24/7 and leave the solar cover off. A chlorine reading that high would not be good for your cover. Hope this helps.
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