In all honesty i wouldn't recommend keeping one in a tank smaller than 75+ gallons. The reason i say this is even though he eats brine and mysis he hunts all day for pods eating hundreds a day. I have to dose my tank every two weeks to keep up... It gets expensive. These guys are very picky eaters and have a fast metabolism. they have to eat throughout the day. I had mine in a breeder net inside my tank. First start with live brine. after he eats that fine then work on frozen. Once that is down go to mysis. Then try soaking some NLS pellets in the mysis liquid and give him that. Took about 2 weeks ish... But once again even though he eats the mysis and brine he'll still pick pods off the rock.