50 gallon tank: dimensions & setup math
36 × 18 × 19 inches (L × W × H). Rounded planning dimensions; measure your tank.
50 nominal gal · about 555.65 lb with water, estimated glass and 2-inch gravel.
Estimated working water uses 85% of nominal: 42.5 US gal. The volume tool instead applies 85% to geometric volume. Neither is a measured fill.
Eight answers for this tank
- Tank volume
53.3 US gallons · 201.76 litres
- Gravel & substrate
75 lb gravel for a 2-inch bed
- Heater wattage
150–250 W planning range
- Filter flow
200–300 GPH for a community
- Stocking guide
648 in² surface · 36-inch swimming length
- Water changes
10.62 US gal for a 25% water change
- Dechlorinator dose
5 mL Prime for 50 US gal of new water
- Filled weight
About 555.65 lb filled (without stand)
Plan around this footprint
This 50 gallon plan uses 36 × 18 × 19 inches and 648 in² of floor. Compared with the 45 gallon (432 in²), its footprint is 50% larger. Medium setup: place equipment so water circulates along the full length, including behind hardscape.
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.