Getting back into the hobby, more thrilled than you can imagine. Going back to a 29 cube, buying from someone getting out of the hobby and we are picking up tomorrow. I need to go and get about 20g of mixed saltwater. I used to get it from Coral Reef Acquarium in Seekonk. Now i'm in North Attleboro and don't know if there is anything closer? Can someone remind me the approximate cost ?