What you have there is a holding tank and not your well, probably because the well, wherever it is, is low producing. First you need to locate your well and find out how deep it is. If it is a shallow well you can usually drill it deeper, or if it is already a deep well you can try hydrofracking it to see if you can get more water out of it. BTW, The small tank you describe is a pressure tank and not a holding tank. Almost everyone with a well has one.