Best Aquarium Fish Deals Online in the UK (25 Deals Found)

Last Updated - 16/12/2025 Sort By:

Best Choice
Crevyteg

New
Crevyteg 12L Fish Tank with Filter and Light, Rectangular Aquarium with Filter And Oxygen Supply, LED Light, Mini Fish T
Filter and Oxygen Supply: This aquarium features a built-in filter that not only cleans the tank but also provides oxyge

£53.99
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Best Value
umorismo

New
umorismo 2 Pcs Fish Tank Decorations Mini Aquarium Decorations Floating Cute Diver Figurines with Water Balloons For Aqu
Set: Contains 2 different colored diver tank decorations, equipped with transparent floating balloons that allow the div

£5.99 £6.99
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New
Live Aquarium Plant - LIMNOPHILA SESSILIFLORA fish tank tropical aquatic fern
Stem plants are the most common form of aquatic plant. They can be planted as is into the aquarium substrate and will so

£12.95
Evolution Aqua

New
Evolution Aqua Pure Aquarium - for a Crystal Clear Healthy Aquarium (50 balls)
NATURAL, CHEMICAL FREE SOLUTION FOR A CRYSTAL CLEAR, HEALTHY AQUARIUM – Pure Aquarium contains beneficial bacteria and n

£9.93 £12.95
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New
25 LIVE AQUARIUM FOR AQUATIC TROPICAL FISH TANK PLANTS LIVE COLDWATER BUNCHED
THESE PLANTS WILL BE BUNCHED IN FIVES SO YOU WILL RECEIVE 5 BUNCHES OF FIVE,NOT 25 BUNCHES. 5 STEMS = 5 PLANTS. THE PLAN

£14.49
Generic

New
8 Pcs Plastic Fake Fish - Colourful Assorted Artificial Plastic Tropical Fish for Bubble Lamp Aquarium Fish Tank Aquariu
You will get 8 pcs fake fish (randam style).

£5.99
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Craftsboys

New
Craftsboys 4.5L Aquarium Starter Kits, Small Arcrylic Betta Fish Tank with Led Lights and Backwall Filter (Black)
Tips: for keeping betta fish, you need to prepare decorations and hide space to reduce water flow velocity.

£26.99
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New
10 Easy Live Aquarium Plants for Tropical/Cold Fish Tanks Bunched Fresh
Looking to enhance your aquarium with vibrant, healthy plants?. Our selection of aquarium plants is perfect for creating

£8.65
NICREW

New
NICREW Fish Tank Filter, Internal Aquarium Filter for Small Tank, Coldwater or Tropical Aquariums, Up to 20L Black
Optimal water filtration system for small aquariums that ensures proper oxygenation for clear water and a healthy enviro

£13.99
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New
Microsorum pteropus Java Fern Listing Live Aquarium Plants Tropical Fish K2AQUA
Looking for unique plant varieties?Be sure to check our collection for rare and interesting species you won’t find anywh

£17.99
AQUARIAN

New
AQUARIAN TAP WATER SAFE, Aquarium Water Conditioner, 118 ml Bottle,White
Contains one (1) AQUARIAN Tap Water Safe, Aquarium Water Conditioner, 118 ml Bottle

£2.25 £2.65
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Craftsboys

New
Craftsboys 10L Fish Tank, Nano Glass Aquarium, Upgrade Filter system and LED Light, for Freshwater & Marine, Filter Ball
COMPLETE KIT: Contains essential accessories for a 10L aquarium including glass tank, LED lighting, filter.

£38.99
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New
5 HYGROPHILA Corymbosa -ROOTED- Live Aquarium Plants Tropical Water Fish Tank
HYGROPHILA CORYMBOSA 'Starhorn Temple Plant'. 5 x Hygrophila Carymbosa - ROOTED - Live Aquarium Aquatic Plants Fish Tank

£6.75
BEGONDIS

New
Betta Fish Tank with LED Light, 15x10x20 cm, Acrylic Aquarium with Cover and Black Wall Paper
DIMENSIONS: Compact aquarium measuring 15 cm x 10 cm x 20 cm, perfect size for a single betta fish with adequate swimmin

£14.99
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New
Vallisneria Gigantea Giant Val Vallis Live Aquarium Aquatic Plants Fish Tank
Vallisneria Gigantea"Giant Val". Take care when planting so as not to crush the sensitive, thick white roots, and be awa

£9.99
API

New
API Stress Coat Aquarium Water Conditioner, Fish , 473 ml Bottle
Contains one API stress coat Aquarium Water Conditioner 473 ml Bottle

£11.09 £11.75
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New
Vallisneria Torta Mini Twisted Vallis Live Aquarium Aquatic Plants Fish Tank
Vallisneria Torta "Mini Corkscrew / Twisted". Similar to Vallisneria asiatica but smaller, t his twisted plant is a grea

£5.49
New
EXTRA LARGE CASTLE XL FISH TANK AQUARIUM ORNAMENT DECORATION BOTH HALVES (55cm)
The castle is suitable for any fish tank size and is easy to clean. 55 x 19 x 37 cm.

£79.99
New
Anubias hastifolia XL (25-40cm) Live Aquarium Plants Tropical Tank K2AQUA
1 XL Plant 30-40 cmLooking to add a touch of elegance and beauty to your aquarium?. Look no further than the Anubias Has

£9.99
New
Amazon Sword Echinodorus Bleheri Live Aquarium Aquatic Plants Fish Tank
A nutritious bottom promotes growth, but the plant needs pruning to prevent it depriving plants underneath of light. Ech

£6.99
New
Vallisneria nana Live Aquarium Plants Tropical Aquascaping Fish Tank K2AQUA
Looking for unique plant varieties?Be sure to check our collection for rare and interesting species you won’t find anywh

£6.49
New
8 Alternanthera Rosaefolia Rooted Live Aquarium Plants Tropical Water Fish Tank
8 X Alternanthera Rosaefolia - ROOTED - Live Aquarium Aquatic Plants Fish Tank. Alternanthera Rosaefolia. Genus: Alterna

£6.75
New
Red Root Floater Very Healthy Live Tropical Aquatic Floating Aquarium Plants
Red Root Floater Phyllanthus Fluitans Live Floating Aquarium Plants. Phyllanthus Fluitans, also known as Red Root Floate

£5.95
New
30 Water lettuce (Pistia Stratiotes) dwarf top quality Floating aquarium pond
30 young small top quality dwarf Water lettuce snail and shrimp safe, great for taking toxins straight from the water. I

£7.99
New
Ultimate Floating Plants Pack! 27 * Great aquarium plants from 5 tough species!
Amazon Frogbit has very long roots, so might reach the bottom of the tank too. Either way, at first, they should be "flo

£12.45

25 Aquarium Fish deals are available from: Amazon, eBay stores, starting from £2.25.
The biggest discount we found is 10%% on Crevyteg 12L Fish Tank with Filter and Light, Rectangular Aquarium with Filter And Oxygen Supply, LED Light, Mini Fish Tank Tabletop Decoration for Home Office Living Room at Amazon.
The lowest price we found is £2.25 while the highest is £79.99.
Prices for the best Aquarium Fish deals average at £15.88.
Last updated on December 16, 2025.
We scanned these quality online stores and more to deliver you with the best offers online available for Aquarium Fish.