29 gallon tank: dimensions & setup math
30 × 12 × 18 inches (L × W × H). Rounded planning dimensions; measure your tank.
29 nominal gal · about 327.66 lb with water, estimated glass and 2-inch gravel.
Estimated working water uses 85% of nominal: 24.65 US gal. The volume tool instead applies 85% to geometric volume. Neither is a measured fill.
Eight answers for this tank
- Tank volume
28.05 US gallons · 106.19 litres
- Gravel & substrate
41.67 lb gravel for a 2-inch bed
- Heater wattage
87–145 W planning range
- Filter flow
116–174 GPH for a community
- Stocking guide
360 in² surface · 30-inch swimming length
- Water changes
6.16 US gal for a 25% water change
- Dechlorinator dose
2.9 mL Prime for 29 US gal of new water
- Filled weight
About 327.66 lb filled (without stand)
Plan around this footprint
This 29 gallon plan uses 30 × 12 × 18 inches and 360 in² of floor. Compared with the 25 gallon (288 in²), its footprint is 25% larger. Small setup: leave an open swimming lane and add livestock in stages after the filter is cycled.
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.