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20 Gallons & Under

Discover a curated selection of versatile freshwater aquariums, 20 gallons and under, designed to fit seamlessly into any space while providing an ideal environment for your aquatic companions.
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48 Items

  1. HelloReef GloFish® Aquarium Kit
    HelloReef
    HelloReef GloFish® Aquarium Kit
    $399.99 $399.99

  2. Fluval Flex 15 Gallon Aquarium Kit
    2 Reviews
    Fluval
    Fluval Flex 15 Gallon Aquarium Kit
    $159.99 $159.99

  3. Fluval Flex 15 Gallon Aquarium Stand (Black)
    Fluval
    Fluval Flex 15 Gallon Aquarium Stand (Black)
    $94.99 $94.99

  4. 60U Rimless Aquarium - 20 Gallon
    Ultum Nature Systems
    60U Rimless Aquarium - 20 Gallon
    $174.99 $174.99

  5. UNS 30C 7 Gallon Aquarium Starter Kit
    Bulk Reef Supply
    UNS 30C 7 Gallon Aquarium Starter Kit
    $159.99 $199.99

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  6. UNS 60U 20 Gallon Aquarium Starter Kit
    Bulk Reef Supply
    UNS 60U 20 Gallon Aquarium Starter Kit
    $367.99 $459.99

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  7. UNS 90B 12 Gallon Aquarium Starter Kit
    Bulk Reef Supply
    UNS 90B 12 Gallon Aquarium Starter Kit
    $383.99 $479.99

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  8. 30C Rimless Aquarium - 7 Gallon
    Ultum Nature Systems
    30C Rimless Aquarium - 7 Gallon
    $79.99 $79.99

  9. 90B Rimless Aquarium - 12 Gallon
    Ultum Nature Systems
    90B Rimless Aquarium - 12 Gallon
    $141.99 $141.99

  10. 60L Rimless Aquarium - 6 Gallon
    Ultum Nature Systems
    60L Rimless Aquarium - 6 Gallon
    $89.99 $89.99

  11. 10 Gallon Scapers Planted Aquarium Kit
    AquaZen
    10 Gallon Scapers Planted Aquarium Kit
    $180.00 $180.00

  12. 4 Gallon Scapers Planted Aquarium Kit
    AquaZen
    4 Gallon Scapers Planted Aquarium Kit
    $140.00 $140.00

  13. Dice Series Pico Cube Aquarium (2 Gal)
    2 Reviews
    Maxspect
    Dice Series Pico Cube Aquarium (2 Gal)
    From: $169.99

    Choose Options Notify Me When In-Stock
  14. UNS 60U Seiryu Stone Aquascaping Bundle
    Bulk Reef Supply
    UNS 60U Seiryu Stone Aquascaping Bundle
    $287.99 $359.99

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  15. UNS 60U Dragon Stone Aquascaping Bundle
    1 Review
    Bulk Reef Supply
    UNS 60U Dragon Stone Aquascaping Bundle
    $263.99 $329.99

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  16. Fluval Spec 5 Gallon Aquarium Kit
    Fluval
    Fluval Spec 5 Gallon Aquarium Kit
    $124.99 $124.99

  17. EDEN 20 FLED Aquarium & Stand (20 Gallons)
    Waterbox Aquariums
    EDEN 20 FLED Aquarium & Stand (20 Gallons)
    From: $519.00

    Choose Options Notify Me When In-Stock
  18. 3 Gallon Nano Cube Rimless Aquarium Kit
    Lifegard Aquatics
    3 Gallon Nano Cube Rimless Aquarium Kit
    $94.99 $94.99

  19. 2 Gallon Nano Cube Rimless Aquarium Kit
    Lifegard Aquatics
    2 Gallon Nano Cube Rimless Aquarium Kit
    $84.99 $84.99

  20. 1 Gallon Nano Cube Rimless Aquarium Kit
    Lifegard Aquatics
    1 Gallon Nano Cube Rimless Aquarium Kit
    $79.99 $79.99

  21. Fluval Spec 5 Gallon Aquarium Starter Kit
    Bulk Reef Supply
    Fluval Spec 5 Gallon Aquarium Starter Kit
    $167.99 $209.99

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  22. Fluval Flex 15 Gallon Planted Aquarium Starter Kit
    Bulk Reef Supply
    Fluval Flex 15 Gallon Planted Aquarium Starter Kit
    $175.99 $219.99

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  23. Fluval Spec 16 Gallon Aquarium Kit
    Fluval
    Fluval Spec 16 Gallon Aquarium Kit
    $264.99 $264.99

  24. Fluval Spec 2.6 Gallon Aquarium Kit
    Fluval
    Fluval Spec 2.6 Gallon Aquarium Kit
    $95.99 $95.99

  25. Fluval Flex 9 Gallon Aquarium Kit
    Fluval
    Fluval Flex 9 Gallon Aquarium Kit
    $119.99 $119.99

  26. Fluval Betta Premium Kit (2.64 Gal)
    Fluval
    Fluval Betta Premium Kit (2.64 Gal)
    $99.99 $99.99

  27. Dice AIO 12 Gallon Nano Cube Aquarium
    Maxspect
    Dice AIO 12 Gallon Nano Cube Aquarium
    $169.99 $199.99

  28. 10 NUVO Fusion PRO 2 AIO Aquarium Bundle
    Innovative Marine
    10 NUVO Fusion PRO 2 AIO Aquarium Bundle
    $321.00 $321.00

  29. 20 Gallon Nano Rimless AIO Aquarium
    JBJ
    20 Gallon Nano Rimless AIO Aquarium
    $240.00 $240.00

  30. 15 Gallon Nano Rimless AIO Aquarium
    JBJ
    15 Gallon Nano Rimless AIO Aquarium
    $205.00 $205.00

  31. 10 Gallon Nano Rimless AIO Aquarium
    JBJ
    10 Gallon Nano Rimless AIO Aquarium
    $155.00 $155.00

  32. 12 Gallon Bookshelf Rimless Tank - Standard Glass
    Mr. Aqua
    12 Gallon Bookshelf Rimless Tank - Standard Glass
    $150.99 $150.99

  33. 3 Gallon Rimless Bow Front Aquarium
    Mr. Aqua
    3 Gallon Rimless Bow Front Aquarium
    $64.99 $64.99

  34. 7.5 Gallon Cube Tank - Low Iron Glass
    Mr. Aqua
    7.5 Gallon Cube Tank - Low Iron Glass
    $110.99 $110.99

  35. 7.5 Gallon Cube Tank - Standard Glass
    Mr. Aqua
    7.5 Gallon Cube Tank - Standard Glass
    $84.99 $84.99

  36. Cube 20 Nano AIO Aquarium - Waterbox
    Waterbox Aquariums
    Cube 20 Nano AIO Aquarium - Waterbox
    $289.99 $289.99

  37. Foresta Paludarium 60E
    Ultum Nature Systems
    Foresta Paludarium 60E
    $439.99 $439.99

  38. Foresta Paludarium 35E
    Ultum Nature Systems
    Foresta Paludarium 35E
    $349.99 $349.99

  39. 20 Gallon Nano Aquarium Stand - Black
    JBJ
    20 Gallon Nano Aquarium Stand - Black
    $245.00 $245.00

  40. 15 Gallon Nano Aquarium Stand - Black
    JBJ
    15 Gallon Nano Aquarium Stand - Black
    $235.00 $235.00