I am buying a entire set-up which the owner said completely crashed do to a power outage. It is a 40g with about 100 lbs of live rock. I have seen pictures and the LR is covered in hair algae. I have a 15g tank right now that I would like to merge with the 40g in the next 1-2 months. Should I just scrub the rock and hope for the best or is there a better way to go about this.