Project complete......
Drained, vacuumed out, flushed the tanks for three minutes each and cleaned out the debris
.
Replaced the four elements and raised the thermo's a tad!
I'm adding a filter to the supply line next (thx, MM), this should really help to extend the life expectancy. I'll put a reminder on my calendar this time!
Oh, the tanks weren't quite two years old, pretty ugly scale......
