Large fish produce massive amounts of waste. They require colossal aquariums and heavy-duty filtration. This category covers the demanding husbandry of species like Oscars, Arowanas, and giant catfish. You cannot keep a Scleropages formosus in a standard glass box. We detail the structural requirements for giant tanks and the reality of extreme water changes. We explain sump filtration mechanics and the necessity of high-turnover pumps. You will learn about the aggressive tendencies and territorial disputes common in large cichlid setups. We break down the massive dietary costs of feeding large predatory fish. Feeder goldfish spread disease. We teach you how to convert wild-caught predators to prepared diets. Stop buying cute baby monsters without planning for their adult size. Read our care sheets. Understand the brutal reality of the bioload. Build an industrial-grade life support system for your massive aquatic specimens.