Though you won't always read it everywhere, or find this out until you are having trouble, LMB's need a large tank with lots of rock. I have read not to put them in anything with less than 90 pounds of rock. The reasoning is they are algae eaters and many of them will not accept any other foods and will starve within months of being added to a tank. But on the flip side many LMB's are pigs and readily accept any and all food. So IMO it is a gamble, and be prepared to trade it in if it will not eat.