had new well put in 2 months ago. well pumps 85 - 90 gal/hr. have light on pump to see how often it cycles. pressure on tank (challenger) is good but tank feels too light to have water holding in it. (shouldn't it have water in it?) when turn on water have surging in lines then water will stop, and light is on constantly. when turn off electric to system for a few minutes and turn back on pressure is good. sometimes water will come back right away, sometimes not until i switch electric off/on several times. well pump cycles 12-18 times sometimes just to flush toilet. have one yard hydrant directly to well and it doesn't do this. i can see the light flash maybe 4 times and use 5 gallons or so with no problem. man that drilled my well will not call me back. can you help? thanks!