Now for the bad news, I pipes below the large reactor were darn near plugged shut. I'm pretty sure that was the main reason the pump stopped running. I cleaned the magnet and there wasn't much in the way of scoring from the material inside the pump.
I found where the water was leaking from. Right below the top of the large reactor cylinder 2" along the cylinder has let loose from the top. Poor picture, but you can get the idea of where this is separated.
I am going to try and fix this by running a bead of Weldon both on the inside and outside of the cylinder. This should be interesting as my only experience in gluing things back together was 40 some years ago building model airplanes....
Anyone with a little more recent experience might chime in here and give suggestions before I attempt this........