Yes, is Ch your FC? Get that up to 10ppm with liquid chlorine. You will have high demand...you can even test during the day and add more to keep it up. 5-10 minute break is plenty time for it to mix. I'd get the pH down to 7.6 for the party, will be better on folks. Need 30 minutes for muriatic to mix before swim. Add chlorine and muriatic at least 15 minutes apart.
