Yea also confused.
What do you mean "torn down out of a 150 gallon tank"?
And "Once they got all of it into the 55 gal. tank, it was short 5 gallons of water. ", what does that mean? Did they transfer the tank, water and all? Is there something important about it being 5 gallons short? I just dont understand what you are saying is all.
As far as the refuge. What do you mean by "Rubble"? The sump/refugium should have a compartment for equipment; skimmer, heater, filtration media, pumps and returns, and a compartment for macroalgae. In the second compartment you could put in sand and LR. When you said sponge, did you mean a filter sponge?