ProEco BF Gravity Flow Filters

This item is eligible for FREE shipping!
SKU: BF-5000
Size: 5000


The BF Series gravity flow filters are ideal for large ponds and water gardens. The Bio Flow gravity flow filters deliver crystal clear water with very low maintenance. The filter design uses both biological and mechanical filtration to provide clean, biologically enriched water. A high volume of oxygen is introduced as the water enters the filter, which maximizes the biological filtration process. The foam filter pads create a healthy environment, which supports the beneficial bacteria that complete the biological filtration process and mechanically remove particulate.


    • Biological Filtration
    • Mechanical Filtration
    • Low Maintenance
    • Kink-Free hose fittings Included
    • Schedule 40 fitting adapters included

    PDF iconBF Filter Manual

    This product is oversized - special shipping rates may apply.

    Clear Water Guarantee Chart

    Clear Water Guarantee Chart


    Model: BF-5000

    • 2300 GPH Maximum Flow Rate
    • Max pond size without fish - 5000 gallons
    • Max pond size with fish - 2500 gallons
    • 3" Outlet
    • 3/4" - 1 1/2" Outlet
    • Recommended UVC, CUV-18 or CUV-36
    • 3 Year Warranty


    Model: BF-10000

    • 3,200 GPH Maximum Flow Rate
    • Max pond size without fish - 10,000 gallons
    • Max pond size with fish - 5,000 gallons
    • 3" Outlet
    • 3/4" - 1 1/2" Outlet
    • Recommended UVC, CUV-36
    • 3 Year Warranty

    Related products

    View all
    Attention Marquis Gardens Family!

    We would like to express our appreciation for all of your support. Thank you for the opportunity to supply your pond needs.

    We are open and operational!

    We have taken extraordinary measures to protect our entire staff during this uncertain time. All employees able to work from home are now doing so. Warehouse staff is limited to essential personnel and taking all recommended protective measures.

    Our team fully understands that you require certain products and items to ensure the health and safety of your pond pets and we are committed to getting you those products.

    Again, thank you very much for your business!