How to Sell a Damaged Aquarium

A damaged aquarium is still worth selling — typically £6 to £45 at For Parts, against £25 to £180 undamaged.

Can you sell an aquarium that is damaged?

Yes. Damaged stock has its own buyers: people who repair and restore, people who want the material rather than the object, and people who want a cheaper one and do not mind a flaw. Nobody should be surprised when it arrives.

The damage buyers look for on aquariums

These are the flaws that move an aquarium down the grades, and the ones a buyer will check first:

Silicone seals that have lifted or perished
Chips at the corners, which risk failure under pressure
Missing lids and light units, often model-specific
Scratched acrylic tanks

Before you list it

A tank with a chipped rim, a crazed pane or perished silicone can let go without warning when refilled. Sell it as a dry tank for a rebuild, and say plainly that it has not been leak-tested.

Grading it honestly

Fair covers something heavily used, or with a described fault or missing part: around £11 to £81. For Parts covers something not working or incomplete, sold as seen: roughly £6 to £45. Grades are seller-declared and nobody inspects them for you, so grading up does not raise what you get — it produces a buyer who arrives expecting something else. All five grades explained.

Working out what you actually have

Establish the flaw properly rather than guessing at it:

Fill it outdoors and leave it standing to check for leaks
Run a fingernail along every seam for lifted silicone
Confirm the filter, heater and light all work

Photographing the flaw

Photograph the damage directly and in focus — it is the evidence that the rest of the description is honest:

The aquarium set up and running, whole, including the cabinet
All equipment laid out together — filter, heater, lights, pump
The silicone seals along the inside corners, close up
The glass edges and base, plus any scratch, chip or limescale line

What to state in the listing

Alongside the flaw itself, buyers of damaged aquariums want these confirmed:

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
Whether the cabinet is included and its condition

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.

What buyers will ask

Answer these in the listing rather than waiting to be asked:

“Does it leak?”

Fill it, leave it standing and report the result. Silicone perishes with age and this is the question every experienced fishkeeper asks first.

“What filter is included?”

Name the model. A good external filter can be worth a large share of the whole setup and buyers search for them specifically.

“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.

Is it worth repairing first?

Only where it is cheap and visibly well done — a clumsy repair costs more than the flaw it hides. What lifts the price:

Complete setups with filter, heater, light and stand
Tanks with no chips, cracks or failing seals
Larger volumes, which are disproportionately expensive new
Recognised brands with spares available

If the work would cost more than the gap between £45 and what a sound one fetches, sell it as is damaged and let the buyer decide.

When to list it

Steady year round, with a lift in autumn and January when people start indoor hobbies. Large complete setups with a cabinet sell within a fortnight; bare tanks are slower — see the fish tank guide if that is what you have.

Getting it to the buyer

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.

WishThrift does not process payments, arrange delivery or hold funds. Confirm the money has cleared before the item leaves your hands, and keep the conversation on the site so there is a record of what was agreed.

Ready to list it? Free to list, no commission, and neither side pays a buyer-protection fee — create a free account, or read the full aquarium selling guide if yours turns out to be sound.

Frequently asked questions

Can you sell a damaged aquarium?

Yes. A damaged aquarium typically is worth £6 to £45 against £25 to £180 undamaged, and there is a real market in repair, restoration and craft stock. Silicone seals that have lifted or perished

Is it worth repairing first?

Only where the repair is cheap and visibly done well. What buyers pay for is complete setups with filter, heater, light and stand — a repair that draws attention to the flaw can leave you worse off.

How should I describe the damage?

Precisely, with a photograph of the flaw itself. Fill it, leave it standing and report the result. Silicone perishes with age and this is the question every experienced fishkeeper asks first. Vague wording is what produces the message asking for a refund.