180 gallon tank, established almost ten years. Wanting to head in a different direction. What's the most shrimp/goby pairs anyone has seen in a larger tank? Would like to try as many shrimp goby species as I can get away with. No sleeper gobies, seeing I want to get a pair of BSJ's. Deep sand bed in tank and sump, display tank has tight mesh top. Thanks, John. [Loungers comment as well!]