Our well is about 300ft with a pump positioned about 150ft down. In 1999 the pump was replaced and a sanitary seal put in place. Prior to this, the well cap was loose and bugs got into the well.
There have been no problems since, until today. I was filling our spa for the first time this season with the garden hose, and the water was noticably cloudy. Looking closely at the suspended solids, it sure seemed like a lot of microscopic bug parts, but I'm not sure. I also noticed it was taking much longer to fill the spa. I observed the pressure gage, and noticed it wasn't able to get beyond 46 psi while the garden hose was going full blast. Normally in this situation, it takes about 45 seconds for a full cycle (pressure switch is 40/60).
I ran the water for about an hour, and this cleared up most of the suspended solids, but the flow is still greatly reduced compared to usual and the pump continuosly runs with the garden hose going full blast, with the pressure not getting higher than 48 psi until the hose is turned off. My theory is that clump of sediment containing dead bugs somehow broke loose and is now creating a partial blockage. Does this sound plausible, and is there any way to clear a blockage like this without pulling the pump?