My current routine is to do my daily testing and chemical additions (liquid 10% chlorine and 31.45% Muriatic acid) shortly after getting home from work at 6:00 p.m.,while it is still light out. I turn on the pump, add the muriatic above a return on the deep end, then the chlorine above a return on the shallow end, run the pump for an hour to mix, and call it good. So, all done in the early evening. As of now, my regular pump cycle is from 11:30 pm to 7:00 a.m. So, the "chemical mix pump run" for an hour earlier in the evening is extra.
The dilemma is that the electricity rates are FAR cheaper after 11:00 pm, so the "chemical mix hour" is costing more than it could. I was contemplating changing my routine, still testing at the usual time, then measuring out what's to be added, but not pouring this into the pool until just before bedtime at 10:30 or so, but not kicking the pump on at that point. Then, the pump would turn on via timer at its usual time at 11:30 to mix. Is there any possible harm to come from leaving the chlorine and/or muriatic undisturbed for this 1-2 hours before the pump kicks on automatically to mix them? Any thoughts would be appreciated.