Where should you place your aquarium in the house? The criteria that actually matter
Published by Planète Pets · managing editor: Clément Lacaille · how our guides are written
The right spot avoids three common problems: algae from direct sunlight, a floor that can't take the weight, and awkward access to power outlets. It's best to pick the location before buying the tank, since moving it once filled is nearly impossible without emptying it entirely.
Contents · 5 sections
Why avoid direct sunlight?
A window exposed for several hours a day will literally trigger a green algae explosion in the water and on the glass, even with well-tuned LED lighting. A wall away from bay windows, or a room with less sun exposure, limits this risk from the start with no extra effort.
Can the floor actually take the weight?
- A 100-litre tank weighs roughly 120 kg once filled and equipped, substrate included.
- Choose a load-bearing wall or a spot near a joist for volumes above 150 litres.
- A stand rated for the weight matters just as much as the floor — see our article on aquarium stand mistakes.
- Avoid upper-floor rooms for very large volumes without advice from a building professional.
Do power outlets and access matter too?
Filter, heater and lighting need several nearby outlets, ideally on a single power strip with a residual-current breaker for safety. Also plan easy access from above for weekly maintenance and from behind for wiring, or every water change turns into a chore.
Do noise and foot traffic play a role?
A busy hallway or a noisy room stresses fish, which are sensitive to vibrations carried through floors and furniture. A calm living room or a moderately used room remains the best compromise between visual enjoyment and peace of mind for the tank's residents.
Frequently asked questions
Can you place an aquarium near a radiator?
No, direct heat interferes with the thermostat and creates temperature swings that are hard to control; keep at least a metre of distance from any heat source.
Is a room corner a good spot?
Often yes, as long as you have clear access on at least two sides for maintenance and wiring, and a wall sturdy enough for the weight.
Should the kitchen be avoided because of the heat?
It's preferable: temperature swings from cooking and ambient humidity complicate the stability you're aiming for in the tank.
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This guide is part of Planète Pets’s Fishkeeping universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.