Bladder tanks don't last long when the pump is cycling every minute or two. The pump cycling on and off makes the bladder (diaphragm) go up and down until it breaks like bending a piece of wire back and forth. When the diaphragm breaks, it is the same as you have now with no air in the tank, and the pump will cycle on/off every 10 seconds or so for a short while, then the pump will be destroyed. I do think having a hydro tank at a dead end like that keeps the air charge from going out as quickly. But there is no way to charge it with air automatically as Boyce described when the tank is at the dead end. You just have to add air on a regular basis with a compressor. If you can keep air in the tank and the pump running for more than one minute and off for more than one minute while using water, it will make your pump last longer.