Your pH is too high so you need to add acid to lower it. Your FC is too low so you need to add chlorine to raise it. You can use The Pool Calculator to figure out dosages though pH adjustment amounts are approximate so you'll add and retest. Your chlorine went away very quickly so you may still be killing off algae, but if you don't stay on top of the chlorine level then algae can come back. Shocking is not a one-time process.