My husband bought a bunch of aquarium items for me for my birthday, two of them are a 29g biocube and a big bag of 'live' sand. The sand is here, the cube should be here tuesday. I was wondering if I should put the sand in a tub with saltwater and aeration until the cube gets here. Would that be good for it, or should I just plan on rinsing it with saltwater when I am ready to put the tank together?