questions on chaeto and RODI

[High tide]

It's a bit hard to tell from those photos, but it looks like red turf algae. I would throw all of it out. The last thing you want is that stuff taking a hold in your tank. "When in doubt, toss it out"!
I don't get the shock thing... nothing plugged in? Is this before you add salt? Static does not make sense, plastic is a bad conductor.