Used aquariums in the UK typically sell for £25 to £180 (about $34 to $240). A complete running aquarium is a different sale from an empty tank — the filter, heater, lighting and cabinet are most of what the buyer is paying for, so inventory the equipment before you price it.
What aquariums are worth in the UK
| Condition | Typical | What it means |
|---|---|---|
| New with Tags | £180 | Unused, tags or seals intact |
| Like New | £153 | Barely used, no visible wear |
| Good | £117 | Light signs of use, complete and working |
| Fair | £81 | Heavily used, or a described fault or missing part |
| For Parts | £45 | Not working or incomplete, sold as seen |
Guide ranges converted from sterling at the 2 August 2026 rate, not quotes — sellers set their own price. Grades are seller-declared; WishThrift does not inspect or verify them.
What lifts the price
- Complete setups with filter, heater, light and stand
- Tanks with no chips, cracks or failing seals
What pulls it down
- Chips at the corners, which risk failure under pressure
- Missing lids and light units, often model-specific
Selling an aquarium in the UK
Most private sales settle by bank transfer or cash on collection. Faster Payments clear in seconds, which makes a transfer as safe as cash for the seller — wait for it to land before the item leaves your hands.
The UK has the deepest second-hand habit of any of our markets — charity shops, car boot sales and online resale have been mainstream here for decades, so buyers arrive already comfortable with used goods and already know roughly what things are worth.
Distance selling rules bind traders, not private sellers, but an item must still be as described and anything sold as working must actually work.
Second-hand demand peaks in January, in the weeks before Christmas, and at the start of the academic year in September.
Working out what yours is worth
- Fill it outdoors and leave it standing to check for leaks
- Run a fingernail along every seam for lifted silicone
Getting it ready
- List every piece of equipment: filter and model, heater wattage, lighting unit, air pump, substrate, decor and cabinet.
- Fill the tank and leave it standing for a few hours to check the seals, then drain it. A seal leak found by the buyer at home is a very bad outcome.
Photograph
- The aquarium set up and running, whole, including the cabinet
- The silicone seals along the inside corners, close up
- The glass edges and base, plus any scratch, chip or limescale line
Put in the description
- Volume in litres and external dimensions including the cabinet
- Every piece of equipment included, named with model where known
- Age of the tank and the silicone, and whether the seals have been tested
Volume and completeness: “180L Aquarium with Cabinet, Filter, Heater and Lights”. Litres is the search term. Naming the filter model matters because external filters are expensive and buyers recognise the good ones. Say tropical, marine or coldwater if the setup is specific to one.
Collection only, fully drained and with the substrate removed. A filled tank must never be moved even a short distance — the flexing cracks the seals. Transport it flat and supported, never on an edge.
It costs nothing to list
There is no listing fee, no selling fee and no commission, so the £180 a buyer pays is the £180 you keep. You and the buyer settle up and arrange the handover between yourselves; WishThrift does not hold the money or ship the item.
Where in the UK
The United Kingdom is a big place and what sells well moves with it. These are the parts of the United Kingdom with their own page for aquariums.
Common questions
Where can I sell an aquarium in the UK?
List it free on WishThrift and deal with the buyer direct. There is no selling fee, so the whole amount stays with you. Most private sales settle by bank transfer or cash on collection. Faster Payments clear in seconds, which makes a transfer as safe as cash for the seller — wait for it to land before the item leaves your hands.
How old is the silicone?
Give your honest best estimate. Tanks over about ten years old are often resealed by the buyer as a matter of course, and saying so is better than being asked.
Should I test a used aquarium before selling?
Yes. Fill it outdoors and leave it standing for a few hours. A leak test is the single most reassuring thing you can tell a buyer.
Do complete setups sell better?
Much better. Beginners need filter, heater, light and stand all at once, and a complete tank saves them sourcing each part.
More: how to sell an aquarium, what aquariums are worth, or Pet Supplies across the United Kingdom.