Sorry for the delay. You only need a humidifier if your plants are suffering from desert air. If anything you may need a dehumidifier more. As far as using distilled water it's okay if your soil mix is buffered. If it's not you may need to add a little cal-mag to buffer the pH.Hello again.I want ask about humidifiers .Is it ok to use it and how much in general?About waters...now i ve distilled water is it ok? In the past i ve read that distilled may causes deficiencies but tap water builds salts. So is it safe to use humidifiers and how ,distance , time ,water etc, ?