Four options that actually meet the 5-gallon minimum for a betta tank. Priced and compared. This page has affiliate links; see our affiliate disclosure. Tank-size recommendations here align with IBC husbandry standards.
Quick comparison
| Tank | Volume | Filter | ~Price | Verdict | Buy |
|---|---|---|---|---|---|
| Fluval Spec V | 5 gal | Included (3-stage) | $90 | Best overall | Amazon |
| Marineland Portrait 5 | 5 gal | Included | $100 | Great aesthetics | Amazon |
| Aqueon MiniBow 5 | 5 gal | Included | $60 | Budget acceptable | Amazon |
| Bare 5-gal glass + separate gear | 5 gal | Sponge filter | $45 | Cheapest real setup | Amazon |
1. Fluval Spec V
The safe recommendation for a single betta owner.
Pros:
- Actually 5 gallons (sometimes listed as 19 L).
- Integrated three-stage filter at the back.
- Good LED light, respects aquatic plants.
- Curved front glass looks nice.
- Flow rate adjustable (important for bettas; reduce to minimum).
Cons:
- Filter flow can be too strong out of box. Baffle with filter floss.
- No heater included; add a Fluval Pro 25W separately (~$25).
- Pump noise noticeable in a bedroom.
Price 2026: $85-95.
Check price on Amazon Affiliate link — see our disclosure.
2. Marineland Portrait 5
The aesthetic choice.
Pros:
- Portrait (tall) shape, 5 gallons.
- Rimless curved glass, minimalist look.
- LED integrated.
- Solid filter.
Cons:
- Tall shape gives bettas less horizontal swimming area. Not ideal.
- Filter impeller can catch long fins; baffle.
- More expensive than Spec V.
- Add heater separately.
Price 2026: $95-110.
Check price on Amazon Affiliate link — see our disclosure.
3. Aqueon MiniBow 5
The budget option that still meets minimums.
Pros:
- Actually 5 gallons (older MiniBow 3 does not qualify).
- Affordable.
- Widely available at PetSmart, Petco, online.
- Includes a basic filter.
Cons:
- Basic filter is not great; upgrade to a sponge filter or baffled HOB.
- LED is weak.
- Add heater.
- Bowl shape (curved sides) limits planting.
Price 2026: $50-65.
Check price on Amazon Affiliate link — see our disclosure.
4. Bare 5-gallon glass + separate gear
Often the best total value.
Shopping list:
- Aqueon 5-gallon glass aquarium: $15-20.
- Hikari or Hygger sponge filter rated 5-10 gal: $10.
- Tetra Whisper 10 air pump: $12.
- Airline tubing + check valve: $3.
- Fluval Pro 25W preset heater: $25.
- Glass lid: $15.
Total: $80-85 new. Often under $50 if you source used on Facebook Marketplace.
Pros:
- Best filtration (sponge filter is the gold standard for bettas).
- Modular; upgrade or replace individual pieces.
- Quietest option.
- Most reliable heater included.
Cons:
- Slightly more assembly.
- Aesthetics vary; cheaper look than Spec V.
- No integrated LED.
Check Aqueon 5-gallon on Amazon Affiliate link — see our disclosure.
What to skip
Anything under 5 gallons. Explicit welfare floor. Don’t buy.
Rounded betta bowls. Poor footprint, often undersized.
“Complete kits” under $40. Usually inadequate.
Tanks with non-removable or weak LED lights claiming aquatic plant support. Most integrated LEDs are mediocre at best.
Add-ons regardless of tank choice
- Heater (if not in kit): Fluval Pro 25W, preset 78 °F.
- Thermometer stick-on or glass: $3.
- Test kit: API Freshwater Master Kit: $30.
- Dechlorinator: Seachem Prime 100ml: $8.
- Substrate: 2-5 lb aquarium sand: $15.
- Live plants: Anubias, Java fern, cryptocoryne: $20 total.
- Cover/hiding spots: Mopani driftwood or ceramic cave: $10-15.
The 10-gallon upgrade
If you have space and a few extra dollars:
- Aqueon 10-gallon bare: $20.
- Basic filter, heater, lid: $50.
Total ~$70 for double the water volume. Better parameter stability, room for tank mates eventually, more planting options. Worth the upgrade if possible.
Honest final take
Fluval Spec V for most buyers who want a nice-looking kit and minimal assembly.
Bare 5-gallon with separate components for buyers who want the best-performing setup at the lowest price.
Skip everything else. The tank is the foundation of the whole system; getting it right is the first step toward a fish that actually thrives.
Related on this site
- Betta Tank Setup: A 5-Gallon Minimum Build, Step by Step
- Best Betta Heaters in 2026: Preset vs Adjustable
- Best Betta Pellets in 2026: Four That Don’t Embarrass Themselves
- Best Live Plants for Betta Tanks in 2026
- Betta Buyer’s Guide: What NOT to Buy
Frequently asked
- Can I just buy a bare 5-gallon and add my own gear?
- Yes, and often it's cheaper and better. A glass 5-gallon aquarium is about 15 dollars at most pet stores. Add a sponge filter, air pump, and preset heater separately for another 30 dollars, and you have a 45 dollar total that beats most packaged kits.
- Is a 10-gallon better?
- Yes. More water volume is more parameter stability. If you have space, go 10. The 5-gallon minimum is a welfare floor, not a target.
- What about acrylic?
- Acrylic 5-gallons scratch easily but weigh less. Glass is the better default. Both work.