10 Gallon

10 Gallon is a 50.8 × 25.4 × 30.5 cm (20 × 10 × 12 in) aquarium, rated at 38 L (10 gal). Its footprint is 50.8 × 25.4 cm and the water stands about 24.5 cm deep once a 6 cm substrate layer is in — the two numbers that decide what you can plant in it and what you can stock it with.

Start a tank this size

At a glance

Size50.8 × 25.4 × 30.5 cm (20 × 10 × 12 in)
Volume38 L (10 gal), as sold
Water after substrateAbout 29 L (8 gal) with a 6 cm substrate layer
Footprint50.8 × 25.4 cm (20 × 10 in)
Water depth24.5 cm (9.6 in)
Substrate neededAbout 8 L for a 6 cm layer

Before it goes in

  • 10 Gallon is 50.8 × 25.4 × 30.5 cm (20 × 10 × 12 in) — rated at 38 L (10 gal), and roughly 29 L (8 gal) of actual water once a 6 cm substrate layer and the hardscape are in.
  • That layer takes about 8 L of substrate, which is what you order by.
  • 25 of the 160 animals in this library list a minimum tank at or under 38 L (10 gal). The biggest of them that still fit are African Dwarf Frog and African Clawed Frog. Neon Tetra and Panda Cory need more than this.
  • The water sits about 24.5 cm (9.6 in) deep over the substrate. Plants that get taller than that — Hygrophila corymbosa 'Siamensis' and Water Sprite — reach the surface and start growing along it, which is a look you either want or trim.
  • Its footprint is 50.8 × 25.4 cm, and that is the area a carpet has to cover — the number that decides how many pots you buy, not the volume.

What are its dimensions?

50.8 × 25.4 × 30.5 cm (20 × 10 × 12 in).

How much water does it hold?

It is sold as 38 L (10 gal), and roughly 29 L (8 gal) of actual water once the substrate is in. Stocking works off the second number; minimum-tank-size advice works off the first.

How much substrate does it take?

About 8 L for a 6 cm layer.

What fits in it?

25 of the 160 animals in this library list a minimum tank at or under its volume, and the water depth of about 24.5 cm sets which plants can grow without reaching the surface.

What fits in it

Often compared with

10 Gallon45PEheim Aquastyle 35
Size50.8 × 25.4 × 30.5 cm45 × 27 × 30 cm31 × 31 × 36 cm
Volume38 L36 L35 L
Footprint50.8 × 25.4 cm45 × 27 cm31 × 31 cm
Water depth24.5 cm24 cm30 cm

More tank sizes