2.5 gallon tank: dimensions & setup math
12 × 6 × 8 inches (L × W × H). Rounded planning dimensions; measure your tank.
2.5 nominal gal · about 35.55 lb with water, estimated glass and 2-inch gravel.
Estimated working water uses 85% of nominal: 2.12 US gal. The volume tool instead applies 85% to geometric volume. Neither is a measured fill.
Eight answers for this tank
- Tank volume
2.49 US gallons · 9.44 litres
- Gravel & substrate
8.33 lb gravel for a 2-inch bed
- Heater wattage
7.5–12.5 W planning range
- Filter flow
10–15 GPH for a community
- Stocking guide
72 in² surface · 12-inch swimming length
- Water changes
0.53 US gal for a 25% water change
- Dechlorinator dose
0.25 mL Prime for 2.5 US gal of new water
- Filled weight
About 35.55 lb filled (without stand)
Plan around this footprint
This 2.5 gallon plan uses 12 × 6 × 8 inches and 72 in² of floor. Compared with the 5 gallon (128 in²), its footprint is 43.75% smaller. Nano setup: measure small doses with a graduated syringe and keep temperature changes gentle.
Dimensions and limits
Aqueon size chart. Listed dimensions are representative, not exact catalog measurements. Names identify marketed sizes; geometry explains why the calculated gallons can differ. Weight excludes the stand, rocks and equipment.