5.5 gallon tank: dimensions & setup math
16 × 8 × 10 inches (L × W × H). Rounded planning dimensions; measure your tank.
5.5 nominal gal · about 71.44 lb with water, estimated glass and 2-inch gravel.
Estimated working water uses 85% of nominal: 4.67 US gal. The volume tool instead applies 85% to geometric volume. Neither is a measured fill.
Eight answers for this tank
- Tank volume
5.54 US gallons · 20.98 litres
- Gravel & substrate
14.81 lb gravel for a 2-inch bed
- Heater wattage
16.5–27.5 W planning range
- Filter flow
22–33 GPH for a community
- Stocking guide
128 in² surface · 16-inch swimming length
- Water changes
1.17 US gal for a 25% water change
- Dechlorinator dose
0.55 mL Prime for 5.5 US gal of new water
- Filled weight
About 71.44 lb filled (without stand)
Plan around this footprint
This 5.5 gallon plan uses 16 × 8 × 10 inches and 128 in² of floor. Compared with the 5 gallon (128 in²), its footprint is 0% larger. 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.