After you get your room is set up and your ready to add your plants use a complete nutrient program. Use the entire program especially if your new to this its not the time to try and read the plants when deficiencies occur. By then your wasting time and money to trying to fix the problem and some times your going to make it worse and worst of all it could have been avoided all together chances are your going to spend the money anyways trying to fix the wrong. So save yourself the headaches. Also it is very had to judge a product if you don't use all of it the way it was meant to be. I just have read a lot of post that people are having problems with nute deficiencies and the start adding supplements when it could have been avoided all together. In addition don't forget to flush on a regular basis. hope this helps.