dlight got the sump right, BUT for the shark and ray, thats a no-no. they will be crammed in that tank. sharks and rays need imo a 300 gallon MINIMUM. they also arent for beginners. start out with something easy like triggers, groupers, eels, lions, etc. if you want predators. also do some reading and research on fish and saltwater tanks, it will help you. no inverts in that tank either. i would reccomend the conscientious marine aquariast by fenner as a great beginner book. good luck on your new tank. bo