Aquarium tanks and accessories
Whatever size tank you are running, the accessories around it matter as much as the tank itself — heating, cleaning and substrate all affect whether the water stays stable for fish to live in. We stock the equipment and decoration side of a tank set-up rather than food, which sits in its own aisle.
Heating and cleaning
The Marina Submersible Pre-Set Heater 300W is built for tanks up to 300 litres and comes pre-set, useful if you would rather not calibrate a heater by hand. For routine cleaning, the Supa Algae Magnet is a magnetic glass cleaner for tanks up to 6mm thick that lets you clean the inside of the glass without getting your hands wet, and the Marina Gravel Cleaner is a mini gravel cleaner for spot-cleaning smaller tanks during a water change.
None of these replace a proper filter, which is a separate piece of equipment entirely — heaters and cleaners maintain water quality and clarity, while filtration is what actually processes waste, so a tank needs both rather than one instead of the other.
Gravel and decoration
Roman Gravel Sonic Blue and Marina Gravel Rainbow are both decorative aquarium gravels suitable across coldwater, tropical or marine set-ups, and Marina Natural Beach Pebble is a natural-look alternative that will not affect water chemistry. For decoration, the Classic Fluorescent Bridge and Classic Fluorescent Skull are hand-painted polyresin ornaments designed to stand out under fluorescent lighting rather than natural light alone.
Gravel and ornaments are largely a matter of preference rather than a fish's actual needs, though some bottom-dwelling species do better with a finer substrate than a coarse gravel, so it is worth checking what your specific fish prefer before choosing purely on looks.
In this section
Everything below is in stock with us, priced with delivery worked out, and packed and posted by hand in the UK.
Goldfish Bowl Starter Kit
Goldfish flakes, Tetra goldfish water conditioner, a fish net and 2kg of natural gravel for a new goldfish tank.
£14.99
Rosewood Pet Keeper Plastic Tank Medium
7.2L ventilated plastic holding tank for small pets and fish, 30 x 30 x 20cm
£13.49
Tropical Tank Care Kit
TetraMin flakes, AquaSafe conditioner, 6-in-1 test strips and a digital thermometer for keeping a tropical tank healthy.
£23.49
Supa Condensation Tray
A 48-inch aquarium condensation tray, shielding the hood's electrics from tank water
£11.49
Aquatic Roman Gravel Jet Black
2kg jet black aquarium gravel, inert and colourfast for coldwater, tropical or marine tanks
£3.99
Pettex Aquatic Roman Gravel Natural Lakeland
Natural Lakeland-tone aquarium gravel for coldwater, tropical or saltwater tanks
From£3.99
Marina Gravel Cleaner
A Mini gravel cleaner with a gravel guard, for spot-cleaning smaller aquariums during water changes
£11.89
Pettex Aquatic Roman Gravel Blend Mix
Natural blended-colour aquarium gravel for coldwater, tropical and saltwater tanks
From£3.99
Roman Gravel Jet Black
8kg of natural jet black aquarium gravel for coldwater, tropical and saltwater set-ups
£12.49
Marina 125 Cartridge
A 2-pack of replacement power cartridges for the Marina i25 internal aquarium filter
£6.49
Common questions
- Do I need a heater for a coldwater tank?
- No, coldwater fish such as goldfish do not need a heater and are kept at room temperature, whereas tropical fish need a heater like the Marina Submersible Pre-Set Heater to maintain a stable, warmer temperature than an unheated room would provide.
- How often should I clean the gravel in my tank?
- A gravel cleaner such as the Marina Gravel Cleaner is generally used during a regular partial water change, spot-cleaning waste that settles into the gravel, rather than as a separate job — how often depends on how heavily stocked the tank is.
- Does aquarium gravel affect water quality?
- Most standard aquarium gravels, including epoxy-coated or natural pebble options, are described as inert, meaning they should not alter water chemistry, but it is worth checking the specific product if you are keeping a species sensitive to water parameters.
- Is a heater necessary for every fish tank?
- Only if you are keeping tropical fish, which need a stable warmer temperature than an average UK room provides. Coldwater species like goldfish are kept without a heater, so check what your specific fish need before assuming one is required.
Related
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.