I ordered a small hydroponic system off eBay and I have a few questions. After I get the seeds sprouted and everything is set up on the system (such as pH between 6 and 7, fertilizer, etc.) How would I go about feeding them? I understand that there are 'nutes' but do I just add them in the water? What are the specifics of feeding them? I heard you are supposed to dissolve the fertilizer first, would you dump out the water you had originally for the plants and then put the dissolved fertilizer in the reservoir? Thanks!