My biggest one in the 180 (12 inches)eats alot of shrimp and alot of pellets. The one in the 125(8 inches) is strictly to pellets and loves lettuce
. They also eat a ton of algae and are pretty good algae cleaners. Yet my two never really went crazy over my algae. Another food my flags like is mussels. Best of luck with that pick up. Where did you get it, anymore there?