How Much Does a 10-Gallon Fish Tank Weigh? Empty, Full and Other Sizes

The tank weights are Aqueon’s, for its own standard glass tanks.

A 10-gallon tank, part by part

Part	Figure	Source
Empty glass tank, 20¼ x 10½ x 12 9/16 in	11 (no unit printed; our reading: lb)	Aqueon’s chart, “10 Leader”
10 gallons of water	About 83 lb (38 kg)	USGS 8.33 lb per gallon; our arithmetic
Gravel	About 10-20 lb	Tetra, 1-2 lb per gallon; our arithmetic
Tank, water and gravel	About 104-114 lb (47-52 kg)	Our arithmetic
Filled tank	111 (same; may vary with substrate and décor)	Aqueon’s chart
Whole set-up	About 100 lb	Aqueon’s freshwater setup article, “approximately 10 lbs per gallon”; our arithmetic

The U.S. Geological Survey (USGS), a federal science agency, gives water’s weight as “Weight: 8.33 pounds/gallon”. Ten gallons is about 83.3 pounds, and about 38 kg on the USGS figure of 1 kilogram per liter (our arithmetic).

Aqueon’s sizing chart prints no unit; our reading is pounds, since 10 gallons of water alone is about 83 pounds. Aqueon adds: “Filled aquarium weights may vary, depending upon substrate and décor.”

For gravel, Tetra’s kit setup guide says: “One to two pounds of gravel for every one gallon of water.” That gives about 10-20 pounds for a 10-gallon tank (our arithmetic). Aqueon’s freshwater setup article says: “An aquarium filled with water, gravel and decorations weighs approximately 10 lbs per gallon.” That is about 100 pounds for 10 gallons, against 111 on its chart (our arithmetic).

Two limits on our sum. It uses the full 10 gallons. Tetra’s guide fills in two stages: first “to within two to three inches of the aquarium rim”, then, finishing, “Water line should be just above the bottom of the aquarium frame, hidden from view.” It also leaves out the hood, light, filter, heater, decor and rock, since none of the sources here weighs them.

Salt water weighs more per gallon. USGS: “As more material is dissolved in a gallon of water that gallon will weigh more and be more dense—ocean water, which contains dissolved salt, is denser than pure water.” None of the pages we cite gives a figure for aquarium salt water.

Other tank sizes on the same chart

Ten of the sizes on Aqueon’s chart are below. The weights are Aqueon’s (no unit printed; our reading is pounds) and apply to its tanks only.

Aqueon tank	Empty	Full
2½ Mini	2.6	27
5½	7	62
10 Leader	11	111
20 High	25	225
20 Long	25	225
29	40	330
30	43	343
40 Breeder	58	458
55	78	625
75	98	785

The same note applies to every row: “Filled aquarium weights may vary, depending upon substrate and décor.” For a betta, our betta tank size guide sets out what vets and makers say about tank size. If you are still choosing fish for 10 gallons, our guide to fish for a 10-gallon tank lists 13 species that sources recommend.

What makers say about stands, surfaces and floors

None of the makers here gives a load rating for furniture or floors. Each one’s wording:

• Aqueon’s sizing chart: “For safety reasons, and to fulfill warranty requirements, it is essential to place your aquarium on an appropriately sized, suitably designed aquarium stand, which will meet all weight and safety specifications.”
• Aqueon’s setup article: “An aquarium stand manufactured for the size tank you are purchasing is your best option because they are specifically designed to be strong enough to support your aquarium!” And: “Make sure the stand is level and does not rock or wobble. Use wood shims to level and stabilize the stand if necessary.”
• Tetra’s kit setup guide: “Pick a flat, level surface near an electrical outlet. An aquarium stand is recommended.”
• Fluval’s Flex 2.0 manual (9- and 15-gallon kits): “Place aquarium on a level, sturdy surface; away from any electrical equipment, direct sunlight, drafts, heat sources or high traffic areas. Ensure Anti-slip Pad is positioned on surface before placing aquarium.”
• Tetra’s tank warranty, issued by Spectrum Brands for Tetra brand tanks (the copy we read is on PetSmart’s site, last revised March 1, 2023), is void in two stand cases: “If the Aquarium Tank Product is placed on any surface that is not commercially manufactured for use with an aquarium of the Aquarium Tank Product’s size and weight or is inadequate to accommodate the size and weight of the Aquarium Tank Product.” and “If the Aquarium Tank Product is placed on a stand, surface, or structure that does not provide a flat, level surface capable of fully supporting the Aquarium Tank Product and its contents, such as on shelving, book cases, dressers, television sets, tables, or carts.”

For floors, Aqueon’s moving guide says: “Make sure the floor in your aquarium’s new location can support the weight and is level.” Our fish tank set-up guide covers choosing a level spot and a stand made for the tank.

Drilling. Aqueon’s chart says “tempered-bottom aquariums are exceptionally strong but cannot be drilled”; it does not say which sizes are tempered-bottom. Tetra’s warranty is void “If the Aquarium Tank Product has experienced any modification or alteration including by drilling, cutting, sawing, gluing anything to, bending, melting, taping, or other similar means.”

Moving or emptying a 10-gallon tank

Most of the weight is water (our arithmetic), and Aqueon and Tetra both say to take it out before moving a tank. Aqueon’s moving guide: “To begin, unplug the heater and allow it to cool for 30 minutes before removing it from the aquarium.” Our water change guide gives the draining steps with each maker’s unplug cautions. Aqueon also says: “NOTE: Regardless of size, NEVER lift or transport an aquarium with water or gravel in it. The weight and/or sloshing water can damage the aquarium, compromise seals and present a potential safety hazard.” Tetra’s guide: “NEVER attempt to move a full or partially full aquarium.” It adds: “NEVER lift an aquarium with wet hands.” and “ALWAYS carry an aquarium from underneath, supporting the bottom at all times.”

Frequently Asked Questions

None of the makers here rates a desk or counter. Tetra’s warranty is void if the tank is “placed on a stand, surface, or structure that does not provide a flat, level surface capable of fully supporting the Aquarium Tank Product and its contents, such as on shelving, book cases, dressers, television sets, tables, or carts.” Aqueon calls a stand made for the tank size “your best option”.

The makers here give no floor rating. Top Shelf Aquatics, a reef retailer, says of its own weight chart: “These are planning estimates, not structural-engineering advice. Large aquariums concentrate substantial loads in a small footprint; consult a qualified professional when floor capacity is uncertain.”

Aqueon’s chart (no unit printed; our reading is pounds) lists its 55 at 78 empty and 625 full; its note says full weights “may vary, depending upon substrate and décor”. The water alone is about 458 pounds on the USGS figure (our arithmetic).

Aqueon’s chart (no unit printed; our reading is pounds) lists 25 empty for both its 20 High and 20 Long, and 225 full; its note says full weights “may vary, depending upon substrate and décor”. The water alone is about 167 pounds on the USGS figure (our arithmetic).

Sources (10)

• Aqueon, aquarium sizing chart (PDF) (maker)
• Aqueon, Standard Glass Rectangle Aquariums (maker)
• Aqueon, Setting Up a Freshwater Aquarium (maker)
• Aqueon, How to Move an Aquarium (maker)
• USGS, Facts About Water (federal agency)
• USGS, Water Density (federal agency)
• Tetra, Aquarium Kit Set-Up Guide (PDF) (maker)
• Tetra tank Limited Warranty, Spectrum Brands (PDF, PetSmart copy) (maker document)
• Fluval, Flex 2.0 Aquarium Kit manual (PDF) (maker)
• Top Shelf Aquatics, Aquarium Weight Calculator (retailer)