BQJ1012: Features: -Biological filter.-Ingredients: Approximate Flow Rate Of 1000 Gph.-Biological filter for medium to large ponds up to 2000 gallons.-For medium and large ponds up to 2000 gallons.-Uv resistant, for use above or below ground. Includes: -Includes a five step valve, optional internal uv clarifiers for clean, clear water, no...