I've had my system for over two years but haven't used it consistently. One of the cups has a small crack due to me dropping it and I always thought this is why I have to apply one pump every 30 seconds. Well I tried hydro yesterday so i filled the cups and noticed water dripping steadily from the hole on the back of the pump. I hung everything up and after several minutes the water had drained from the cups. Is my pump defective?