Hi! Ok, so my hubby and I buy 4 crabs about a month ago, and since then I have become OBSESSED! LOL Unfortunately, we have had one go to heaven b/c I think he was too stressed from his prior environment where we bought him, and 2 are buried (molting I hope) and one little guy all by his lonesome. So... we are going to get a couple more this w/e. Can we mix PPs and Es?