I'm trying to learn as much as possible about keeping reef and Fowlr tanks. Currently I have a 72 G FOWLR tank. I just bought a Refugium and Don't know what kind of Substrate to put in it or Algae.
Also I have a 55 G reef that I'm getting a Refugium for and was wondering if I can put my pesty Emerald Crab in the fuge with LR sand and Algae.


Any Help is greatly appreciated.
Thanks