The pump and feeder tube are an ineffective way of getting water to the roots early on. Thepump creates heat, the tubes clog, the rate of delivery is inexact and not adjustable. Bubble action does the same thing with no frankensteinish tubes, no heat, and it is easily and precisely adjustable. This is how advanced dwc growers have been doing it for years. The pump and tubes and bubbleponics stuff is a commercial gimmick to sell kits, not grow plants.