no suggestions for your tank. but.... caribes/cannibals love to eat eachother, i ordered five last year and now i have 2 6 inch fatty caribe. if your not home all day have someone throw some fish fillets in there every 2 or three hours to reduce the risk of cannibalism. im looking for tips to keep the cannabalism down. im thinking lower temps and lots of feeding, possibly dithers in there as well.. but im no expert anyone with alot of caribe experience speak up! how can we reduce the cannabalism?? oh you may not wanna go throught the trouble but your gravel is gonna get very very dirty when i used gravel with my caribe the water got cloudy sooooo quick, i would scoop that gravel out asap and swith to a light layer of sand. since aquascape gets the caribe monday or tuesday you have time to switch to sand..i also have babies comin my way