150 gallon fish tank: dimensions, weight & setup
A standard 150 gallon tank measures 72 × 18 × 28 inches, holds about 138.5 gallons of real water and weighs roughly 1,555 lb once set up. It is a great size for large species such as clown loaches and plecos, and deep reef or planted displays.
150 Gallon tank dimensions
| Inches | Centimeters | |
|---|---|---|
| Length | 72 in | 182.9 cm |
| Width (front to back) | 18 in | 45.7 cm |
| Height | 28 in | 71.1 cm |
| Footprint | 1,296 in² (9.0 ft²) | 8,361 cm² |
| Typical glass | 1/2 in | 13 mm |
These are typical outside dimensions for US glass tanks; brands vary slightly, so measure yours before buying a stand, lid or background.
How much water does it really hold?
| US gallons | Liters | |
|---|---|---|
| Outside dimensions | 157.1 | 594.7 |
| Filled 1 in below the rim | 138.5 | 524.1 |
| With 2 in of gravel | 128.0 | 484.6 |
Dose medication and fertilizer for the real water — about 128 gallons once the tank is aquascaped, not 157.
How much does a 150 gallon tank weigh?
| Empty (estimated, 1/2 in glass) | 315 lb | 143 kg |
|---|---|---|
| Filled with fresh water | 1,470 lb | 667 kg |
| Set up, fresh water + 2 in gravel | 1,553 lb | 704 kg |
| Set up as saltwater | 1,580 lb | 717 kg |
| Floor load under the stand | 173 lb/ft² | 8.3 kPa |
Add rock, decor and the stand (often 40–120 lb). A floor load of 173 lb/ft² is 4.3× the 40 lb/ft² a typical home floor is designed for when averaged over a room, so place the stand across the joists and near a load-bearing wall. Use the weight calculator to include your own rock and stand.
Heater size
| Room temperature (water at 78 °F) | Heater |
|---|---|
| 73 °F (5 °F lift) | 2 × 150 W |
| 68 °F (10 °F lift) | 2 × 250 W |
| 63 °F (15 °F lift) | 3 × 250 W |
See the heater size chart by tank or size your own in the heater calculator.
Plan maintenance with the water change schedule: a 30% change on this tank is about 38.4 gallons.
Filter flow
| Tank type | Real flow | Filter rating |
|---|---|---|
| Community tropical | 554–831 GPH | 791–1,187 GPH |
| Planted tank | 692–1,108 GPH | 989–1,582 GPH |
| Goldfish, cichlids or heavy feeders | 1,108–1,385 GPH | 1,582–1,978 GPH |
Substrate
| Depth | Gravel | Sand |
|---|---|---|
| 1 in (2.5 cm) | 70 lb | 68 lb |
| 2 in (5.1 cm) | 140 lb | 135 lb |
| 3 in (7.6 cm) | 209 lb | 203 lb |
Stocking ideas
- 5 clown loaches + 20 rummy-nose tetras + 2 bristlenose plecos
- 1 common pleco as a centerpiece, with strong filtration
- 6 angelfish + 12 corydoras + 2 bristlenose plecos
Check any combination — including temperature and group size — in the stocking calculator.
Setup tips
- At 28 inches tall, reaching the bottom requires long tools; many owners use a sump with an overflow.
- Over 1,500 lb set up: get a structural opinion on the floor before you buy.
- Two 250 W heaters, ideally with an external controller, keep 128 gallons of water stable.
FAQ
What are the dimensions of a 150 gallon fish tank?
A standard 150 gallon glass tank measures 72 × 18 × 28 inches (182.9 × 45.7 × 71.1 cm) on the outside, a footprint of 9.0 square feet. Brands differ by up to about half an inch.
How much does a 150 gallon fish tank weigh?
About 315 lb empty, 1,470 lb filled with water and roughly 1,555 lb set up with 2 inches of gravel, before rock, decor and the stand.
How many gallons does a 150 gallon tank really hold?
157.1 gallons by its outside dimensions, about 138.5 gallons (524 liters) filled an inch below the rim, and about 128.0 gallons with 2 inches of gravel.
What size heater does a 150 gallon tank need?
2 × 250 W to hold 78 °F in a 68 °F room; 2 × 150 W in a 73 °F room and 3 × 250 W in a 63 °F room.
How much gravel or sand for a 150 gallon tank?
About 70 lb of gravel per inch of depth: 140 lb for a 2-inch bed, or 135 lb of sand.
What filter flow does a 150 gallon tank need?
554–831 GPH of real flow for a community tank (4–6× turnover), so choose a filter rated about 791–1,187 GPH.