UK Aquarium Buying Guides
Explore aquarium care, species profiles and buying advice. Use the guides to plan your setup, then check current options on each listing.
Explore these guides
Start here — category guides(3)
Tropical Fish
Tropical fish guide for UK beginners — what they are, the easiest species to start with, tank size and water basics. Read, then shop our in-stock range.
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Freshwater Fish
The UK guide to freshwater fish — the main groups, the most popular species, how to choose, and what to start with. Browse live in-stock fish today.
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Tropical Fish Temperature
Most tropical fish want a steady 24–26 °C. Get the ideal range, heater sizing, a by-species table and UK heatwave fixes — then shop our live stock.
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Tetras, rasboras & barbs(10)
Black Phantom Tetra
Black phantom tetra care for UK aquariums: size, 80 cm tank footprint, group, sexing clues, water, tank mates and a current availability check.
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Black Neon Tetra
Black neon tetra care, tank mates and how it differs from the common neon tetra — the hardy schooler that thrives in UK tap water. See live stock.
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Lemon Tetra
Lemon tetra care for UK aquariums: adult size, tank length, group, water, tank mates and identification, with live stock shown only when available.
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Gold Barb
Gold barb care for UK tanks — the hardy golden schooler that shrugs off cool water and hard tap. Tank size, mates, hardiness, and live stock. Shop now.
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Serpae Tetra
Serpae tetra care for UK tanks — why this red tetra nips fins, the group size that stops it, the tank mates to avoid, plus live stock to buy.
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Flame Tetra
Flame tetra care for UK tanks — the red-orange Von Rio schooler that tolerates cooler water, the group size it needs, plus live stock to buy.
Read guideChili Rasbora
Chili rasbora (Boraras brigittae) for sale UK — care, tank size, water and tank mates for this tiny red nano fish. Live stock with live arrival guarantee.
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Lambchop Rasbora
Lambchop rasbora (Trigonostigma espei) care for UK keepers — the slim copper cousin of the harlequin. Tank size, water, tank mates. Shop live stock now.
Read guideGalaxy Rasbora
Galaxy rasbora (celestial pearl danio) for sale UK — care, tank size, tank mates and water for this jewel-spotted nano fish. Live stock, live arrival guarantee.
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Tetra
Compare popular tetra fish by adult size, swimming space, water needs and temperament. A UK guide to choosing a suitable shoal before you buy.
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Guppies, platies & livebearers(7)
Molly Fish
UK molly fish guide — short-fin vs sailfin, the colour strains, why hard tap water is ideal, sexing, breeding & in-stock mollies. Read or listen.
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Female Guppy
Browse female guppy fish in the UK and learn how to sex mature guppies, plan female-only or mixed groups, manage fry risk and buy responsibly.
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Balloon Molly
Honest UK balloon molly guide — what the round body really is, the welfare facts, lifespan, hard-water care & in-stock fish. Read or listen first.
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Mickey Mouse Platy
Identify the Mickey Mouse platy, compare male and female fish, and plan group size, tank space, water and fry care with evidence-led UK guidance.
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Guppy Types
Compare guppy types by colour pattern, tail shape and species. See six photographed varieties, Endler differences and UK care checks before choosing.
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Green Swordtail
Read or listen to our UK green swordtail guide — sword vs no sword, ratios, jumping lids, tank size, strains and live delivery. Shop swordtails in stock.
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Variatus Platy
Variatus platy guide for UK keepers: compare adult size, temperature, male and female features, water, groups, fry risk and buying checks.
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Cichlids & angelfish(15)
German Blue Ram
German blue ram care made honest — warm 27–30°C, soft stable water, tank size, tank mates and the electric blue & gold rams in stock. Shop now.
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Kribensis
Kribensis care for UK aquariums: 80 cm tank guidance, pairs, water, breeding behaviour and tank mates, with live fish shown only when available.
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Apistogramma
Compare Apistogramma types by size, water and social setup. UK guide to tank footprint, compatibility, care and checking current fish availability.
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Flowerhorn
Honest UK flowerhorn guide - real tank size, why they live alone, the kok, water, feeding and welfare-first buying advice. See flowerhorns in stock.
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Angelfish Types
Learn which angelfish names are species, colour varieties or fin forms. Compare koi, marble, silver, platinum and veil labels before choosing.
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Firemouth Cichlid
UK firemouth cichlid guide — why it flares that red throat, real tank size, water, honest tank mates and the live Thorichthys meeki we ship. Read it first.
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Electric Blue Ram
Electric blue ram care for UK aquariums: adult size, 27–30°C water, tank size, tank-mate risks and buying checks, with live stock shown when available.
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Apistogramma Cacatuoides
UK guide to the cockatoo dwarf cichlid (Apistogramma cacatuoides) — the beginner's apisto. Harem ratio, hard-water care, the red strains & in-stock fish.
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Jack Dempsey
UK Jack Dempsey cichlid guide — real tank size, temperament, the Electric Blue morph, hard-water care, tank mates and in-stock fish. Read or listen.
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Koi Angelfish
Koi angelfish (Pterophyllum scalare koi) explained - the orange crown, why patterns shift with stress, tank size and tank mates. See ours in stock.
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Apistogramma Agassizii
UK guide to Apistogramma agassizii, the spade-tailed Agassiz's dwarf cichlid: ID vs cockatoo apistos, soft-water care & in-stock strains. Read or listen.
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Angelfish Tank Mates
Check angelfish tank mates by adult size, water, behaviour and space. Compare common choices, warning signs and an exit plan before mixing fish.
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Lake Malawi Cichlids
The honest UK guide to Lake Malawi cichlids - mbuna vs peacocks, hard water, aggression and tank size, plus the live fish we stock. Shop the colours.
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Altum Angelfish
Identify true Pterophyllum altum, check adult size and plan a tall, warm, soft-water aquarium with source-checked UK care and buying guidance.
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Oscar
Oscar fish care for UK keepers: adult tank size, growth, feeding, colour forms and compatibility risks, with live stock shown only when available.
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Catfish, plecos & algae-eaters(11)
Ancistrus Pleco
Is an Ancistrus a bristlenose pleco? Decode species names, sp., cf., L-numbers and colour forms before choosing a correctly identified fish in the UK.
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Pygmy Corydoras
Learn pygmy corydoras care with evidence-led UK advice on group size, tank footprint, water, sand, feeding, tank mates and current availability.
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Siamese Algae Eater
Siamese algae eater size, tank and care explained for UK keepers: identity limits, 120 cm aquarium guidance, algae diet, grouping and tank mates.
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Panda Corydoras
Plan Panda Corydoras care with source-checked size, group, tank, temperature, substrate, feeding and compatibility guidance for UK aquariums.
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Clown Pleco
Clown plecos (L-numbers) stay small enough for a 90 L tank but need wood and specific water conditions. L204, L206, L226 compared. The 5 lines in UK stock today.
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Common Pleco
Common pleco size and tank planning for UK aquariums: identify the fish, compare Hypostomus and sailfin records, check food, water and rehoming.
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Bronze Corydoras
UK bronze corydoras guide — shoal size, the smooth-sand rule, the 'cleaner fish' myth busted, hard-water care and in-stock cories. Read or listen.
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Bristlenose Pleco
How big do bristlenose plecos get? Compare the 15 cm UK care figure with 9.1 cm standard length, plus measurement, identity and tank-planning limits.
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Albino Corydoras
Identify albino Corydoras correctly and plan their group, tank, water, food and substrate with source-checked guidance for UK aquariums.
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Julii Corydoras
UK julii corydoras guide — the honest truth that nearly all 'julii' sold here are false julii (C. trilineatus). How to tell them apart. Read or listen.
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Chinese Algae Eater
Chinese algae eater care for UK tanks: 28 cm maximum standard length, tank planning, diet, aggression risks, tank mates and buying checks explained clearly.
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Betta fish(4)
Female Betta Fish
Shop female betta fish in the UK and read an honest care guide covering solo tanks, sorority risks, tank size, water, feeding and suitable tank mates.
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Betta Fish Tank Mates
Can a betta live with other fish? Compare tank size, shoaling needs, water and behaviour before choosing fish, shrimp or snails—and plan separation.
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Betta Fish
Buy betta fish in the UK with confidence — tail types, tank size, heater, tank mates and live Betta splendens we ship this week. Read or listen now.
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Betta Fish Temperature
Set a typical domestic Betta splendens tank to a stable 26–28°C. Learn how to check the water, choose a thermostatic heater and handle changes safely.
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Shrimp, snails & inverts(5)
Cherry Shrimp
Compare red, blue, yellow and rili Cherry Shrimp types in the UK. Learn what colour names mean, what photos cannot prove and what to check before buying.
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Amano Shrimp
Find the live UK Amano Shrimp listing, then check today's selectable size, sale unit, price and stock. Verify Caridina multidentata care before checkout.
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Assassin Snail
Assassin snails (Anentome helena) for sale in the UK — the natural way to control pest snails. Care, water parameters, what they eat, breeding, and live stock with careful UK dispatch.
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Vampire Crab
Our UK vampire crab guide - Geosesarma colour forms, the paludarium they actually need, group size, diet and safe live delivery. Shop in stock now.
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Freshwater Shrimp
Compare Neocaridina, crystal, Amano and bamboo shrimp by water, breeding and aquarium role, then check live UK sizes, prices and availability.
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Loaches, rainbows & oddballs(7)
Kuhli Loach
Kuhli loaches (Pangio kuhlii) — the eel-like substrate-burrowers every UK planted tank wants. Social biology, substrate welfare, species ID, and live stock.
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Hillstream Loach
The hillstream loach is the UK's go-to high-flow specialist — sucker-bodied, cool-water, algae-eating. Species ID, tank setup, and the 5 varieties we ship.
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Rainbow Shark
The rainbow shark isn't a shark — it's a territorial cyprinid that bullies its own kind. Honest UK care, tank size, real tank mates. See ours in stock.
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Killifish
Killifish made simple: annual vs non-annual, the types we stock - Aphyosemion, Gardner's, Nothobranchius, lampeyes - plus care. See our live killis.
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Paradise Fish
Paradise fish (Macropodus opercularis): one of the oldest aquarium fish, stunning, hardy and happy in an UNHEATED tank (16-26C) - but feisty. Honest care + live UK stock.
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Boesemani Rainbowfish
Boesemani rainbowfish (Melanotaenia boesemani) care for UK tanks — tank length, group size, water and tank mates. Shop the live shoal today.
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Neon Rainbowfish
Neon rainbowfish (Melanotaenia praecox) care for UK tanks — group size, the tank length they need, water and tank mates. Shop the live shoal.
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Coldwater & pond(3)
White Cloud Mountain Minnow
White cloud mountain minnow care for UK tanks — the hardy coldwater nano fish that thrives unheated. Tank size, mates and live stock. Shop now.
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Cold Water Fish For Sale
Buy cold water fish online UK — goldfish, white cloud mountain minnows, rosy barbs, pearl danios and the 10 best no-heater species, with live delivery.
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Comet Goldfish
Honest UK comet goldfish guide — they're coldwater, hit 30 cm+, live 20+ years and need a pond or huge tank, never a bowl. Care, sarasa, in-stock fish.
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