Overflows

Aquarium Overflows allow water to travel from your display tank down to a sump or other filtration devices. The overflow will set the water level in your display tank, and any water that makes it over the edge of the overflow box will then fall down to your filtration system. Their are multiple styles of overflows and we HIGHLY recommend a traditional internal overflow that requires a drilled aquarium. However, there are HOB (hang on back) styles of overflows that utilize a siphon principal to bring the water up and over the edge of the aquarium before it can travel down to the sump which does not require any holes in your aquarium. HOB overflows do have some inherent risks for flooding which is why we recommend a internal overflow.
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22 Items

  1. Deluxe CS50 Overflow with Lid and Air Pump - CPR Aquatics
    CPR Aquatics
    Deluxe CS50 Overflow with Lid and Air Pump - CPR Aquatics
    $199.99

    Earn 995 Reward Points Earn 1,990 Reward Points

    $199.99
  2. Deluxe CS90 Overflow with Lid and Air Pump - CPR Aquatics
    CPR Aquatics
    Deluxe CS90 Overflow with Lid and Air Pump - CPR Aquatics
    $229.99

    Earn 1,145 Reward Points Earn 2,290 Reward Points

    $229.99
  3. Deluxe CS102 Overflow with Lid and Air Pump - CPR Aquatics
    CPR Aquatics
    Deluxe CS102 Overflow with Lid and Air Pump - CPR Aquatics
    $264.99

    Earn 1,320 Reward Points Earn 2,640 Reward Points

    $264.99
  4. Prodigy M Low Profile Overflow Box (700 GPH) - Eshopps
    Eshopps
    Prodigy M Low Profile Overflow Box (700 GPH) - Eshopps
    $169.98

    Earn 169 Reward Points

    $169.98
  5. LoPro External Overflow Box (400 GPH) - Fiji Cube
    Fiji Cube
    LoPro External Overflow Box (400 GPH) - Fiji Cube
    $125.99

    Earn 125 Reward Points

    $125.99
  6. LoPro External Overflow Box (800 GPH) - Fiji Cube
    Fiji Cube
    LoPro External Overflow Box (800 GPH) - Fiji Cube
    $153.99

    Earn 153 Reward Points

    $153.99
  7. LoPro External Overflow Box (1600 GPH) - Fiji Cube
    Fiji Cube
    LoPro External Overflow Box (1600 GPH) - Fiji Cube
    $223.99

    Earn 223 Reward Points

    $223.99
  8. LoPro External Overflow Box (2400 GPH) - Fiji Cube
    Fiji Cube
    LoPro External Overflow Box (2400 GPH) - Fiji Cube
    $274.99

    Earn 274 Reward Points

    $274.99
  9. Eclipse S Overflow Box (600 GPH) - Eshopps
    Eshopps
    Eclipse S Overflow Box (600 GPH) - Eshopps
    $134.98

    Earn 670 Reward Points Earn 1,340 Reward Points

    $134.98
  10. Eclipse M Overflow Box (800 GPH) - Eshopps
    Eshopps
    Eclipse M Overflow Box (800 GPH) - Eshopps
    $149.98

    Earn 745 Reward Points Earn 1,490 Reward Points

    $149.98
  11. Eclipse L Overflow Box (1000 GPH) - Eshopps
    Eshopps
    Eclipse L Overflow Box (1000 GPH) - Eshopps
    $159.98

    Earn 795 Reward Points Earn 1,590 Reward Points

    $159.98
  12. PF-800 HOB Overflow - Eshopps
    Eshopps
    PF-800 HOB Overflow - Eshopps
    $119.98

    Earn 595 Reward Points Earn 1,190 Reward Points

    $119.98
  13. PF-1000 HOB Overflow - Eshopps
    Eshopps
    PF-1000 HOB Overflow - Eshopps
    $139.98

    Earn 695 Reward Points Earn 1,390 Reward Points

    $139.98
  14. PF-1200 HOB Overflow - Eshopps
    Eshopps
    PF-1200 HOB Overflow - Eshopps
    $149.98

    Earn 745 Reward Points Earn 1,490 Reward Points

    $149.98
  15. INOUT Overflow and Pulsing Return System - XAqua
    XAqua
    INOUT Overflow and Pulsing Return System - XAqua
    $110.13

    Earn 550 Reward Points Earn 1,100 Reward Points

    $110.13
  16. Deluxe CS150 Overflow with Lid and Air Pump - CPR Aquatics
    CPR Aquatics
    Deluxe CS150 Overflow with Lid and Air Pump - CPR Aquatics
    $274.99

    Earn 1,370 Reward Points Earn 2,740 Reward Points

    $274.99
  17. Prodigy L Low Profile Overflow Box (900 GPH) - Eshopps
    Eshopps
    Prodigy L Low Profile Overflow Box (900 GPH) - Eshopps
    $189.98

    Earn 189 Reward Points

    $189.98
  18. PF-Nano HOB Overflow - Eshopps
    Eshopps
    PF-Nano HOB Overflow - Eshopps
    $89.98

    Earn 445 Reward Points Earn 890 Reward Points

    $89.98
  19. PF-300 HOB Overflow - Eshopps
    Eshopps
    PF-300 HOB Overflow - Eshopps
    $109.98

    Earn 545 Reward Points Earn 1,090 Reward Points

    $109.98
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