Yeah the sand is normal and why we have the spin down pre-filter. A couple years ago I ripped out all the copper and other metal plumbing in the house other than this one area by the pressure tank. As you can see in the photo of the filters, everything from them on is PEX now.
It is possible that rubber hose is the source. I would imagine it has fibers like that. If it is, the hose is at risk of blowing out. I imagine I should replace it either way. I will have to look and see if I have any 1" PEX left over from the last project. I just find it confusing as to where it is coming from. I can't think of anything like that coming from the pump or anything in the well.
It is possible but I didn't think a bladder would have all those fibers. I always thought of it as little more than a rubber liner. We had a bladder rupture before I can drain everything again and see if I get water out of the schrader valve. That is the normal test for a ruptured bladder. The only reason I don't think it is that is that if I run the pump for a while, which I did when I was testing the pressure switch, I get a lot of water out of it. It maintains pressure until the tank is empty and I know it is because it moves easily. When my last tank ruptured I was getting a short cycling of the well pump and it was completely waterlogged.
Yeah I should check the pressure again but I need to drain the tank first. I had installed this tank a few years back and set it to 38psi due to the 40/60 switch. I just filled it up again. Being I have filled and drained it a few times today and it is getting late I think I will wait a day. I want to let our septic system catch up as I have been running a lot of water down the drain.