33 gallon long fish tank size and measurements
How big is a 33 gallon long tank? It is about 4.0 feet long (48 in), 13 inches from front to back and 13 inches tall, so it needs a stand or space at least 48 x 13 inches.
- Outside dimensions
- 48 x 13 x 13 in121.9 x 33 x 33 cm
- Volume
- 33 US gal125 L, 27 UK gal
- Footprint
- 4.3 sq ft624 sq in
- Water weight
- 275 lb125 kg
Checked against the manufacturer's specs: the Aqueon 33 Long measures 48 1/4 x 12 3/4 x 13 3/8 in outside, 46 lb empty. The size above is the rounded standard size most charts use.
Measured from the outside, these dimensions hold about 35.1 US gallons. Real water volume is lower because of glass thickness, substrate, decor and the gap below the rim. Check the real figure with the aquarium volume calculator.
How much does a 33 gallon long tank weigh?
A 33 gallon long tank weighs about 393 lb (178 kg) once set up, counting the empty glass (46 lb), the water and 2 inches of gravel. Use a stand rated for the full weight, on a level floor. The fish tank weight guide compares every size.
How much gravel or sand for a 33 gallon long tank?
| Bed depth | Gravel | Sand | Aquasoil |
|---|---|---|---|
| 1 in (2.5 cm) | 36 lb | 34 lb | 10 L |
| 2 in (5.1 cm) | 72 lb | 69 lb | 20 L |
| 3 in (7.6 cm) | 108 lb | 103 lb | 31 L |
Based on a 48 x 13 in floor and typical bulk densities.
Different depth? Use the aquarium substrate calculator.
Heater and filter size for a 33 gallon long tank
A common rule is 3–5 watts per gallon, so a 33 gallon long tank needs about 99–165 W: one 150 W heater suits most rooms. Use the higher end in cold rooms.
For filtration, aim to turn the water over 4–6 times an hour: a filter rated around 132–198 gallons per hour.
Fish that suit a 33 gallon long tank
- Large schools of danios or rasboras
- Corydoras and loach groups
- Hillstream loaches in a flowing setup
- Low aquascapes with carpeting plants
Starting ideas only. Check each species' adult size, temperament and water needs before buying.
Compare nearby sizes
- Next smaller: 30 gallon, 36 x 12 x 16 in
- Next larger: 38 gallon, 36 x 12 x 20 in
- Same 48 x 13 in footprint: 55 gallon, 21 in tall
- Same 48 x 13 in footprint: 60 gallon, 24 in tall
See every size in the aquarium size chart.
Frequently asked questions
What are the dimensions of a 33 gallon long tank?
A standard 33 gallon long aquarium measures about 48 x 13 x 13 inches (121.9 x 33 x 33 cm), length x width x height. Brands vary by a fraction of an inch.
How long is a 33 gallon long tank?
About 48 inches (121.9 cm), or 4.0 feet.
How big is a 33 gallon long tank?
It is about 4.0 feet long, 13 inches deep and 13 inches tall, and takes up 4.3 square feet of floor.
How much does a 33 gallon long tank weigh when full?
About 393 lb (178 kg) once set up, counting the empty glass (46 lb), the water and 2 inches of gravel.
How much gravel do I need for a 33 gallon long tank?
For a 2 inch bed, about 72 lb of gravel or 69 lb of sand.
What size heater does a 33 gallon long tank need?
About 99–165 watts in total, so one 150 W heater suits most rooms.
Last updated .