But in general.. Have you considered planting a seed in soil and just getting into the habit of watching a plant grow successfully without being the sole source of it's perfect feed every feed, when this is your first grow? Soil isn't as sexy as hydro these days, (which coco essentially is, semantics aside,) but there's no "huge hydroponic yields" at the end unless you're really dialed in. Quite the opposite. If your environment isn't good and you don't really know what you're doing, hydro can be a killer, could spend the next 6 months staring at various little yellow plants wondering what bottle to either blame or find the answer to. Fun science experiment, but what if you got some good soil, chop it with perlite, and get some experience watching a marijuana plant actually grow, hopefully flower? I use a mostly hydro blend, but so many people jump straight into hydro, coco, dwc first time with building experience of getting used to the plant... That's my advice man, get a couple soil grows under your belt, let God do the heavy lifting. The experience, if you want to do coco after a successful soil grow, you wont feel nearly as bewildered as now.