Hi There… pop over to the AutoPot Watering Systems FB page as there are lots of videos there also on the home page of the website is the brochure and potting up guides. Never pour additional feeds through the top always in the tray next to the AQUAvalve not on it….. but turn the system off 12 hours before fill trays …. leave for 30 mins and repeat. If you need to speak in more detail please feel free to call the office on the number on the website.