many of those company's make products designed just for sales and profits. i mean how many additives does one company have to make. i like to use cutting edge solutions. they make just a simple 3 part nutrieant. micro,grow,bloom and they have a simple 3 part additive. uncle josh's bland,plant amp, and cal mag. with are basically the icicng on the cake so to speak. arent needed but there if you want the added boost to your grow. now when 1 company can make one line of products then you know they are doing well.
look at advanced nutes they make so many they have to have a catologe published. house and garden takes up 5 shelves at my local grow store and general has 2 line to chose from. why not just the best product right from the start? well cutting edge does. just 1 line done right.