How does your water look? If it is clear, then I wouldn't add but 1.5 gallons to start it up. That would take you up to about 10ppm. I assume this is a vinyl pool? If that is the case, don't worry about the calcium hardness reading. Your ph is too high. Add a cup of muriatic acid slowly in front of a return jet. (1 cup at a time.) Wait several hours to let it circulate, then retest and redose until you get your ph down to 7.4-7.6. Also, add a little baking soda to the skimmer while the pump is running to raise your alk to 80-125. Probably start with a cup at a time. Add it slowly and break up any clumps. Adjust it in the same way as the ph, add, wait, retest, redose. CYA is good, don't want it any higher. Don't use any dichlor or trichlor to chlorinate with. Just use bleach.
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