Hi, first of all you dont need to water every day. quite the contrary, during the early vegetative stage your plant won't need that much water and give the soil some time to dry is of good health to the plant (a dry period).
With regards to nutrients,I give nutrients every time I water, if I notice that I might be approaching a salt buildup I might skip 1 feeding session and gice it plain water only but this is the exception.
Good luck with your grow, if you need anything else feel free to drop me a message and I can send you a couple of articles on the topics you want. (for the most part RQS has vrry good articles)