The Fluval CP3 Circulation Pump is an internal aquarium powerhead designed to add water movement in compatible freshwater, marine, and reef aquariums. With a listed flow rate of approximately 425 GPH / 1,600 L/h, the CP3 can help improve circulation in medium aquarium setups. Additional water movement can help reduce low-flow areas, move debris toward filtration, and improve surface movement when positioned properly. The Fluval CP3 can be used in planted aquariums, African cichlid tanks, fish-only saltwater systems, reef aquariums, and larger community aquariums when the flow is appropriate for the livestock. Key Features Internal Circulation Pump: Adds water movement inside compatible aquariums Approximately 425 GPH: Listed flow rate of about 425 GPH / 1,600 L/h Adjustable Flow Direction: Allows circulation to be directed where needed Compact Design: Useful for medium aquarium setups needing additional flow Freshwater, Marine & Reef Use: Can be used in compatible systems when installed properly Internal Mounting: Designed for placement inside the aquarium with an adjustable bracket Product Information Brand: Fluval Model: CP3 Product Type: Circulation pump / aquarium powerhead Flow Rate: Approximately 425 GPH / 1,600 L/h Use: Internal aquarium water circulation Aquarium Type: Freshwater, marine, and reef aquariums Mounting: Internal adjustable bracket Best Uses Freshwater community aquariums Planted aquariums needing additional water movement African cichlid tanks Fish-only saltwater aquariums Compatible reef aquariums Marine aquariums with rockwork Moving debris from behind rocks, wood, and decorations Why Use a Circulation Pump? A circulation pump can help move water through areas that may not receive enough flow from the main filter alone. This can be useful behind rockwork, driftwood, decorations, plants, and other aquascape areas where debris may settle. Flow needs vary by aquarium. Cichlid tanks, reef systems, and larger community aquariums may need more circulation than slower-flow setups. Always position the pump based on the livestock, aquascape, and filtration needs of the aquarium. Setup & Maintenance Tips Install according to the Fluval manufacturer instructions Position the pump so flow does not overly stress fish, plants, or corals Avoid pointing strong flow directly at slow-moving fish Use the adjustable direction to target low-flow areas Check placement after feeding to see where debris settles Clean the pump intake and impeller during routine maintenance Unplug the pump before cleaning or repositioning Important Flow Note The Fluval CP3 is a circulation pump, not a return pump or primary filter. It adds water movement but does not replace mechanical, chemical, or biological filtration. Use it alongside properly sized aquarium filtration and regular maintenance. Because livestock have different flow needs, make sure the CP3 is appropriate for the aquarium size, aquascape, and fish or coral being kept. Frequently Asked Questions Is the Fluval CP3 a return pump?No. The Fluval CP3 is an internal circulation pump designed to add water movement inside the aquarium. What is the flow rate of the Fluval CP3?The Fluval CP3 has a listed flow rate of approximately 425 GPH / 1,600 L/h. Can the Fluval CP3 be used in saltwater aquariums?Yes, it can be used in compatible marine and FOWLR aquariums when installed and maintained according to the manufacturer’s instructions. Can the Fluval CP3 be used in reef aquariums?Yes, it can be used in compatible reef aquariums when positioned properly. Monitor coral response and adjust placement as needed. Is the flow adjustable?The flow direction can be adjusted. The output strength is fixed, so placement is important for aquariums with calmer-water fish or sensitive livestock. Does the Fluval CP3 replace an aquarium filter?No. It is a circulation pump, not a filter. Use it with properly sized aquarium filtration. Available at Tropical Treasures Wyo The Fluval CP3 Circulation Pump is an internal aquarium powerhead with approximately 425 GPH flow for freshwater, marine, and reef aquariums. Visit Tropical Treasures Wyo in Cheyenne, Wyoming, to shop Fluval circulation pumps, aquarium powerheads, filters, filter media, water conditioners, test kits, fish food, and aquarium care essentials.
