37 gallon tank: dimensions & setup math
30 × 12 × 22 inches (L × W × H). Rounded planning dimensions; measure your tank.
37 nominal gal · about 402.3 lb with water, estimated glass and 2-inch gravel.
Estimated working water uses 85% of nominal: 31.45 US gal. The volume tool instead applies 85% to geometric volume. Neither is a measured fill.
Eight answers for this tank
- Tank volume
34.29 US gallons · 129.79 litres
- Gravel & substrate
41.67 lb gravel for a 2-inch bed
- Heater wattage
111–185 W planning range
- Filter flow
148–222 GPH for a community
- Stocking guide
360 in² surface · 30-inch swimming length
- Water changes
7.86 US gal for a 25% water change
- Dechlorinator dose
3.7 mL Prime for 37 US gal of new water
- Filled weight
About 402.3 lb filled (without stand)
Plan around this footprint
This 37 gallon plan uses 30 × 12 × 22 inches and 360 in² of floor. Compared with the 33 gallon long (624 in²), its footprint is 42.31% smaller. 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.