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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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47 Items

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

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

  3. 60U Rimless Aquarium - 20 Gallon
    Ultum Nature Systems
    60U Rimless Aquarium - 20 Gallon
    $194.99 $194.99

  4. UNS 60U 20 Gallon Aquarium Starter Kit
    Bulk Reef Supply
    UNS 60U 20 Gallon Aquarium Starter Kit
    $377.19 $459.99

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  5. 30C Rimless Aquarium - 7 Gallon
    Ultum Nature Systems
    30C Rimless Aquarium - 7 Gallon
    $87.99 $87.99

  6. 45U Rimless Aquarium - 9 Gallon
    Ultum Nature Systems
    45U Rimless Aquarium - 9 Gallon
    $104.99 $104.99

  7. 60L Rimless Aquarium - 6 Gallon
    Ultum Nature Systems
    60L Rimless Aquarium - 6 Gallon
    $99.99 $99.99

  8. 10 Gallon Scapers Planted Aquarium Kit
    AquaZen
    10 Gallon Scapers Planted Aquarium Kit
    $180.00 $180.00

  9. 4 Gallon Scapers Planted Aquarium Kit
    AquaZen
    4 Gallon Scapers Planted Aquarium Kit
    $140.00 $140.00

  10. UNS 60U Seiryu Stone Aquascaping Bundle
    Bulk Reef Supply
    UNS 60U Seiryu Stone Aquascaping Bundle
    $295.19 $359.99

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  11. UNS 60U Dragon Stone Aquascaping Bundle
    1 Review
    Bulk Reef Supply
    UNS 60U Dragon Stone Aquascaping Bundle
    $270.59 $329.99

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

  13. 3 Gallon Nano Cube Rimless Aquarium Kit Aquatics
    Lifegard
    3 Gallon Nano Cube Rimless Aquarium Kit Aquatics
    $81.99 $99.99

  14. 2 Gallon Nano Cube Rimless Aquarium Kit Aquatics
    Lifegard
    2 Gallon Nano Cube Rimless Aquarium Kit Aquatics
    $72.97 $88.99

  15. 1 Gallon Nano Cube Rimless Aquarium Kit Aquatics
    Lifegard
    1 Gallon Nano Cube Rimless Aquarium Kit Aquatics
    $68.05 $82.99

  16. Fluval Spec 5 Gallon Aquarium Starter Kit
    Bulk Reef Supply
    Fluval Spec 5 Gallon Aquarium Starter Kit
    $172.19 $209.99

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

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

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

  20. Dice AIO 12 Gallon Nano Cube Aquarium
    Maxspect
    Dice AIO 12 Gallon Nano Cube Aquarium
    $199.99 $199.99

  21. DeskMate 4.8 Gallon AIO Aquarium w/ LED Light
    Eshopps
    DeskMate 4.8 Gallon AIO Aquarium w/ LED Light
    $147.58 $179.98

  22. 20 Gallon Nano Rimless AIO Aquarium
    JBJ
    20 Gallon Nano Rimless AIO Aquarium
    $240.00 $240.00

  23. 15 Gallon Nano Rimless AIO Aquarium
    JBJ
    15 Gallon Nano Rimless AIO Aquarium
    $205.00 $205.00

  24. 10 Gallon Nano Rimless AIO Aquarium
    JBJ
    10 Gallon Nano Rimless AIO Aquarium
    $155.00 $155.00

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

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

  27. 15 Gallon Nano Aquarium Stand - Black
    JBJ
    15 Gallon Nano Aquarium Stand - Black
    $235.00 $235.00

  28. 10 Gallon Nano Aquarium Stand - Black
    JBJ
    10 Gallon Nano Aquarium Stand - Black
    $225.00 $225.00

  29. HelloReef 15 Gallon Aquarium Stand
    4 Reviews
    HelloReef
    HelloReef 15 Gallon Aquarium Stand
    From: $164.99

    Choose Options Notify Me When In-Stock
  30. Fluval Flex 15 Gallon Aquarium Kit
    2 Reviews
    Fluval
    Fluval Flex 15 Gallon Aquarium Kit
    $159.99 $159.99

  31. 45T Rimless Aquarium - 11 Gallon
    Ultum Nature Systems
    45T Rimless Aquarium - 11 Gallon
    $148.99 $148.99

  32. UNS 30C 7 Gallon Aquarium Starter Kit
    Bulk Reef Supply
    UNS 30C 7 Gallon Aquarium Starter Kit
    $163.99 $199.99

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  33. UNS 90B 12 Gallon Aquarium Starter Kit
    Bulk Reef Supply
    UNS 90B 12 Gallon Aquarium Starter Kit
    $393.59 $479.99

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  34. 90B Rimless Aquarium - 12 Gallon
    Ultum Nature Systems
    90B Rimless Aquarium - 12 Gallon
    $159.99 $159.99

  35. 60S Rimless Aquarium - 10 Gallon
    1 Review
    Ultum Nature Systems
    60S Rimless Aquarium - 10 Gallon
    $142.99 $142.99

  36. Dice Series Pico Cube Aquarium (2 Gal)
    2 Reviews
    Maxspect
    Dice Series Pico Cube Aquarium (2 Gal)
    From: $99.99

    Choose Options Notify Me When In-Stock
  37. 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
  38. Fluval Flex 15 Gallon Planted Aquarium Starter Kit
    Bulk Reef Supply
    Fluval Flex 15 Gallon Planted Aquarium Starter Kit
    $180.39 $219.99

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

  40. 10 NUVO Fusion PRO 2 AIO Aquarium Bundle
    Innovative Marine
    10 NUVO Fusion PRO 2 AIO Aquarium Bundle
    $256.80 $321.00