Yea I do the same thing twice a week foiler (misting) spray until week 3 flower just when the buds start showing. 1st spray is Ez-wet,jumpstart, kelp and the 2nd is azamax ,protekt. You can look up what these bottles do but for quick reason why I do it is because it keeps the bugs/PM off while adding trace elements and other nutrients.
Plenty of benefits for foiler spraying and there is plenty of research out there so yup its good but "just" water might not do as much for you, to keep it simple start with just Kelp/seasweed extract and as you learn you can't start to add other stuff to your arsenal. Haven't had a bug or powder mildew problem since I started foiler!!!