I've considered add a a couple LMB, but haven't made the jump yet. Concerning grass shrimp, are they the same as ghost shrimp? I have seen ghost shrimp go sale before at pet stores. I also wonder if grass shrimp would be able to survive this far north. I read that they ussually dig 2 to 3 foot burrows to nest, couldn't this be potentially risky in regards to chasing leaks?