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Fish Tank

Spec Aquarium Kit – Aquarium 5 gallons

March 28, 2025
Spec Aquarium Kit
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    Spec Aquarium Kit, 5 US Gal (19 L)

    Having a compact, beautiful, and efficient aquarium is easier than it seems—especially when you start with the right setup. The Spec Aquarium Kit, 5 US Gal (19 L) by Fluval is, without a doubt, one of the most recommended kits for beginners or anyone looking for a stylish and functional tank for a small space. Let me walk you through everything you need to know from my perspective as a detail-oriented aquarist.

    I was initially skeptical about getting a 5-gallon aquarium because I enjoy the process of setting up separate lights and filters. I thought this type of all-in-one tank might not be sufficient. However, today I can confidently say that this tank is perfect for my betta, and the lighting is ideal for the plants I have inside (Anubias, Bacopa Monnieri, and Bucephalandra).

    Spec Aquarium Kit 5 US Gal (19 L): Very Good for Beginners

    Not all beginner aquarium kits are created equal. Some lack proper filtration, others include weak lighting or an unattractive design. But this model surprised me right from the start.

    It has everything you need to start strong: high-quality glass, included LED lighting, a powerful and quiet filter, and a sleek design that fits any desk or shelf.

    With its true 5-gallon (19-liter) capacity, it’s perfect for small fish or shrimp without falling into the typical mistakes of undersized tanks.

    Features of Spec Aquarium Kit

    The Spec 5-gallon kit is packed with thoughtful features that make a big difference:

    • Tank material: Durable glass with polished edges
    • Size: 20.5″L x 7.5″W x 11.6″H
    • Actual capacity: 5 gallons (19 liters)
    • LED lighting: High-output 7000K LED with all-aluminum, waterproof casing for enhanced plant growth and fish colors
    • Filtration: Hidden 3-stage system
      • Mechanical foam
      • Chemical carbon
      • Biological BioMax rings
    • Quiet, adjustable water pump
    • Sleek internal layout: hides filtration system from view

    Fluval’s Spec Aquarium Kit wins for its balance of aesthetics, functionality, and ease of use. This five gallon fish tank is ideal for beginner aquarists

    Pros and Cons of the Spec Aquarium Kit, 5 US Gal

    Pros Cons
    Modern design that fits anywhere Not suitable for large fish
    Quiet and efficient 3-stage filtration LED light is not dimmable
    Great for beginners Heater not included
    Includes adjustable water pump Limited space for active fish
    Bright, durable LED lighting Thermometer not included
    Quick and easy setup Filter compartment may be tight for large hands
    Perfect for low-light plants Slightly more expensive than basic kits
    Easy to clean and maintain Only available in one size

    Advantages of the Spec Aquarium Kit, 5 US Gal (19 L)

    • Compact yet fully functional size
    • Premium aesthetics without complexity
    • Great for shrimp, bettas, or nano aquascaping
    • Super simple to assemble
    • Extremely quiet—great for bedrooms or offices
    • Good lighting for beginner plants like Anubias or Java moss
    • Low energy consumption
    • Easy-access design for quick maintenance

    Other Benefits of the Spec Aquarium Kit, 5 US Gal (19 L)

    • Compatible with modifications or upgrades (pump, sponge, etc.)
    • Available in multiple colors like black and white
    • Well-planned interior layout separates display from filtration
    • Fluval is a reputable brand with strong customer support
    • Makes a perfect gift or starter tank

    Customer Reviews for Spec Aquarium Kit, 5 US Gal (19 L)

    User Rating Review
    John L. ★★★★★ Perfect size for my office desk. The filter is super quiet, and the light is great for low-light plants.
    Megan T. ★★★★★ Beautiful five gallon tank! Easy setup and my betta loves it. The build quality feels premium for the price.
    Carlos F. ★★★★★ I’m impressed with the clarity of the glass and how everything fits perfectly. Excellent starter tank.
    Samantha R. ★★★★★ Great little tank. I added a heater and it’s the perfect home for my shrimp and plants.

    Frequently Asked Questions

    How many fish can you put in a 5 gallon tank?
    A 5-gallon tank is best for 1 betta fish or 3–5 small nano fish like endlers or chili rasboras. Avoid overcrowding to maintain water quality.
    What is the standard size 5 gallon aquarium?
    A typical 5-gallon aquarium measures about 16″ x 8″ x 10″ (40.6 x 20.3 x 25.4 cm). It’s compact and suitable for desktops or small spaces.
    How big is a 19 litre fish tank?
    A 19-litre tank is roughly equivalent to 5 US gallons. It’s ideal for a single betta, shrimp, or nano fish setups with careful stocking.
    How many fish can I put in a 19L tank?
    Limit to 1 betta or 3–4 tiny fish like ember tetras or shrimp. A 19L tank requires careful monitoring to avoid overstocking and poor water quality.
    How big is a 5 liter tank?
    A 5L tank is extremely small (~1.3 gallons). It’s not suitable for fish and should be reserved for plants or shrimp only, with proper filtration.
    What fish do well in a 5 gallon tank?
    Ideal options include bettas, endlers, chili rasboras, or celestial pearl danios. Avoid goldfish or schooling species that need more space.
    How often do you need to change a 5 gallon fish tank?
    Do 25–50% water changes weekly. Smaller tanks accumulate waste faster, so regular maintenance is key to keeping fish healthy.
    What is the easiest fish to take care of?
    Bettas are often considered the easiest for beginners due to their hardiness and ability to live in smaller tanks with basic care.
    How long do you leave a new fish tank before adding fish?
    Ideally, wait 1–2 weeks while the tank cycles. Use test kits or a starter bacteria product to ensure ammonia/nitrite levels are safe before adding fish.

    Final Thoughts on Spec Aquarium Kit, 5 US Gal (19 L)

    To sum it up, the Fluval Spec Aquarium Kit is an excellent choice whether you’re just starting or already experienced. It strikes the perfect balance between design, efficiency, compact size, and ease of use.

    It’s a solid investment if you want a small tank that performs. Its integrated filtration and lighting system make it stand out from other kits in the same class.

    My recommendation? Don’t hesitate. If you want a five gallon aquarium, that truly works, this model delivers on all fronts and more. If you need help setting up your first aquarium, click here.