Thanks Mitch. No detritus, as I cleaned the tank out completely after my mishap. Yes, I have some old rock. Some I have had since the early '90,s. But I also have some new stuff that I replaced older rock with.
The tank was fine a couple months ago with this rock.
By the way, the "and" was for Ian. I still need a reactor and if the short version is no good for tumbling, and the one he suggested to high for my situation, then ??
I,m thinking now I may just get a Vertex and put it in the sump beside my return pump. No reason that should not work.