Fish & Aquatics
Accessories
Clear water. Happy fish.
Filters, media, heaters, nets, ornaments and plants.
The essentials for a healthy tank or pond.Shop accessories
Little essentials. Lots of love.
4 items together
Large Aquarium Maintenance Set
Included
- 1 × Supa Condensation Tray
- 1 × Marina Deluxe Aquarium Scraper
- 1 × Marina Digital Aquarium Thermometer
- 1 × Tetra Aquasafe
£32.49 for the set
Save £3.36 vs buying separately
Liners, mats & filters
Supa Synthetic Filter Wool
- Pack
- Under 500g
- Material
- a fine web of fibres (filter wool)
£3.29
Browse all 48 accessories
Find their favourites
More for fish & aquatics
Everything for fish & aquatics, one department at a time.
A little guidance
Choosing from our accessories range
Start with the part of the range that matches what your fish needs, then compare the available products and filters above.
Aquarium Accessories →
This aisle covers the equipment and décor that make up a working aquarium beyond the tank itself — heaters, filters, lighting, substrate and the ornaments that give fish somewhere to explore and hide. Getting the core equipment right matters far more for fish health than the décor does, so it is worth prioritising accordingly.
Core equipment: heating and filtration
A heater is essential for most tropical setups, since tropical fish need a stable water temperature well above typical UK room temperature, and a submersible heater with a thermostat is the standard way to maintain that. Filters do the ongoing work of keeping water clean and supporting the beneficial bacteria that break down fish waste, and choosing one rated for your tank's actual volume, rather than undersized for cost, matters for long-term water quality.
Both heaters and filters are worth checking regularly rather than assumed to be working — a failed heater or a clogged filter can affect fish health quickly, often before it is obvious just from looking at the tank.
Lighting and substrate
Aquarium lighting serves both fish and any live plants in the tank, and the right type and duration depends on what you are keeping — a heavily planted tank generally needs stronger, longer lighting than a simple fish-only setup. Gravel and substrate choices affect both the look of a tank and, for a planted setup, how well plants can root.
Changing or adding substrate is easier to plan properly before a tank is fully stocked, since disturbing gravel around established fish and plants is more disruptive than doing the groundwork early.
Common questions
Do all fish tanks need a heater?
Most tropical setups do, since tropical fish need a stable water temperature well above typical UK room temperature. Coldwater setups, such as those for goldfish, generally do not need one, but it depends on the specific species kept.
How do I choose the right filter for my tank?
Choose a filter rated for your tank's actual volume rather than the cheapest option available, since an undersized filter struggles to keep water quality stable as fish waste builds up.
Do I need special lighting for a planted aquarium?
Generally, yes — a heavily planted tank needs stronger and longer lighting than a simple fish-only setup, since plants rely on it to grow well, whereas fish alone do not need light at that intensity.
Is all aquarium décor safe for fish?
Not automatically. It is worth checking that anything added to a tank is specifically sold as aquarium-safe, since ornaments intended for other purposes are not always safe for a fish tank's water chemistry.