I purchased a 55 gal tank and due to footprint decided to go bigger. I bought a used 100 gallon that has not been well maintained and am not sure what to do now. The 55 gallon has fresh rodi salt water so I thought it would be a good holding tank while I clean the 100 gallon, Whats the best option to remove the algae on the rocks? I believe I see 2 cukes and an urchin, pencil II think. As far as what else is in there Im lost. Any ID of other life and advice would be greatly appreciated .I could not upload pics so I added to gallery. There should be a link in the drop down menu below my name.