you basically made it into a plain old peace of dead rock.chances are,you will trigger a cycle when its added to the tank.if i have a problem with my live rock that i paid $5 a pound or more for,i pull off the algae and put some kalkwasser on the aiptasia.i put it in the tank and if i still get algae then i look at what may be causing it.algae spores are supposed to last over 7 yrs,just waiting for favorable conditions to grow again.i've had algae on most of my rock and all i ever did was use better filters and check my water till it slowly went away.send me all the algae covered rock and i'll buy you some nice clean tuffa any time.
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55 gallon reef with 4x54 watt t5,29 gallon sump,red monti cap,1blue echinophyllia,trumpet,red lobo,2 toadstools 1purple and 1neon,gsp,xenia and yellow xenia,red ,many mushrooms,2 giant frilly shrooms,cabbage coral,yellow polyps,many zoos,1 orange and one neon green nepthia,duncans,cladiella | 
"burning" live rock 
