Actually this is a very common question not exactly common knowledge as it can vary greatly from grower to grower, and can be completely elusive to those new at hydro depending on the system used, but the best advice I can give you is start off by just giving them a basic diet. breakfast at lights on, lunch in the mid day and dinner an hour or so before lights out, each beaing 15 minutes each this is the way I run all my ebb n flow setups and I have a few different versions (Bit of a hydro horder like to change it up almost every grow) after that just watch the progress each day if they seem like they are asking for more you can either extend your lunch to 30 min or add another 15 in there somewhere any more and your probably over doing it!!! the next best piece of advice I can offer you is study study study buy books read all the hydro threads here ask the rite questions to the rite people and befriend them so you can get an educated experienced answer when you need a real question answered! Hydroponics can be very difficult for some, proper knowledge on how it works (far different from soil) is the best defense against failure!!! You should start a thread/journal of this grow (be sure to add pictures) and ask questions make lots of updates. This will save you a ton of hassle on your next grow since you can just go back look at what went wrong or rite and avoid making the same mistake twice hope this was helpful for you feel free to ask me anything else u may need help with and I will do my best happy farming and Jah bless
