I am in the process of starting a new tank and just received a shipment of nano live rock from TBS. Most of it went into the sump. They also included in my order a free urchin, which is cool, except that I have literally nothing except water, sand, and rock in my tank at the moment, and I don't have my lights set up. I'm planning to build a canopy with some T5 lighting in it, but I wasn't planning on having that in place for a few weeks. So there's not going to be any ready sources of algae for a bit. Given that, can I just put in some nori every so often for the urchin? If so, how often should I plan on adding it? And how long can I leave the nori in the tank?

