Moderate
Neon Tetra (Paracheirodon innesi)
21–25°C · pH 5–7
From £1.66Some sizes on sale
Also in packs from £21.49
Nano Tank Fish for Sale UK
Explore small-system possibilities. Choose freshwater, marine or paludarium needs first, then compare adult space and groups.
Shop stock207 live listings
3 things to check before orderingShow
- Small supplied size does not mean small adult needs
- Check group size, water and swimming space
- This collection is not a ready-made stocking plan
Current Nano Tank Fish listings
207 products
Easy
Male Guppy (Poecilia reticulata) — Mixed Colours
22–28°C · pH 7–8
£2.49
Moderate
Super Delta Big Ear Male Betta Mix (Betta splendens)
26–28°C · pH 6–8
£17.99
Moderate
Zebra Horned Nerite Snail (Clithon sp.)
19–26°C
£3.99
Moderate
Mosquito Rasbora (Boraras brigittae)
24–28°C · pH 4–7
£3.99
Also in packs from £29.49
Moderate
Male Libby Split-Tailed White XL Betta (Betta sp.)
20–28°C · pH 6–8
£15.39
Easy
Assassin Snail (Anentome helena) - 0.5-1 cm
22–27°C · pH 6.5–7.5 · 20L
£6.49
Moderate
Ember Tetra (Hyphessobrycon amandae)
£3.09
Also in packs from £14.99
Moderate
Sparkling Gourami (Trichopsis pumila)
22–28°C · pH 6–7.5 · 30L
£4.99
Easy
Blue Turquoise Female Guppy (Poecilia reticulata)
22–28°C · pH 7–8
£4.99
Easy
Supercolour Mix Male Guppy (Poecilia reticulata)
22–28°C · pH 6.8–8.5 · 40L
£3.99
Easy
Tiger Male Guppy (Poecilia reticulata)
22–28°C · pH 7–8
£5.99
Easy
Koi Tuxedo Female Guppy (Poecilia reticulata)
22–28°C · pH 6.8–8.5 · 40L
£4.99
Easy
Blue Moscow Female Guppy (Poecilia reticulata)
22–28°C · pH 7–8
£3.99
Easy
Red Tuxedo Male Guppy (Poecilia reticulata)
22–28°C · pH 7–8
£3.99
Easy
Mosaic Elephant Ear Guppy (Poecilia reticulata) — Female
22–28°C · pH 7–8
£3.99
Easy
Neon Red Male Guppy (Poecilia reticulata)
22–28°C · pH 7–8
£3.99
Easy
Green Cobra Male Guppy (Poecilia reticulata)
24–28°C · pH 6.8–8
£4.99
Easy
Supercolor Mix Guppy (Poecilia reticulata) — Female
22–28°C · pH 7–8
£4.99
−12%
Moderate
Super Delta Male Betta Mix (Betta splendens) – Single Male
24–27°C · pH 6–8 · 20L
£10.99£12.49
Easy
Mixed Guppy, Female, F1 (Poecilia reticulata)
22–28°C · pH 7–8
£2.99
Moderate
Halfmoon Female Betta Mix (Betta splendens)
22–30°C · pH 6–8
£7.99
Easy
Sunset Blonde Male Guppy (Poecilia reticulata)
22–28°C · pH 7–8
£3.99
Moderate
Female Betta Mix (Betta splendens)
26–28°C · pH 6–8
£5.09
Also in packs from £21.99
Before you choose from this collection
ShowHide
Explore fish, shrimp and other small-system possibilities. The range includes freshwater, marine and semi-terrestrial animals, so identify the required environment before comparing size. Nano does not mean every offer suits a 10-, 20- or 40-litre aquarium.
Use adult size, swimming space, group needs and water conditions to narrow your choice. A small fish sold as a juvenile may need more room later; a peaceful label does not guarantee compatibility.
Compare the current product listings and ask about your tank dimensions, cycling and existing residents if you are unsure. Plan the whole group and its care before ordering.
Explore related collections
Visual route into our wider UK live-fish range.
Rasboras & Danios
Rasboras, danios and White Cloud Mountain Minnows. Compare adult space, temperature and group needs, then check each individual or pack offer.
Shrimps & Crustaceans
Compare Cherry, Amano, Caridina and filter-feeding shrimp, plus crayfish and crabs. Match housing, food, adult space, supplied size and sale unit.
Freshwater Snails
Shop freshwater aquarium snails in the UK. Compare current species, adult size, water needs, diet, breeding risk, compatibility, prices and availability.
Frequently asked questions
Start with the aquarium dimensions, maturity and water conditions, then check the exact species. Adult size, activity and social needs matter as well as litres. This collection is a starting point, not a stocking plan.
The right number depends on the species, its social group and the available space. Check adult size and swimming needs alongside your tank footprint, filtration and existing residents before deciding on a group.
Check the selected size and sale unit on each listing, then budget for the appropriate group and its care. Current product pages show the price and availability; delivery is shown at checkout.
Equipment depends on the animals and room conditions. Check the exact species’ temperature and water-quality requirements, and establish a suitable, stable aquarium before adding livestock.
Sometimes, but this needs a species-specific plan. Match water requirements, check predation risk and provide suitable cover. A small fish is not automatically safe with shrimp, especially young shrimp.
Read our delivery page for the current coverage and dispatch information. If there is an arrival problem, email your order number and clear photos on the day of arrival. An unboxing video is optional.
Watch: Nano Tank Fish in 60 seconds
Short clips from our own channel — the things keepers most often get wrong, answered in a minute.
Keep exploring
Shop related
- Rasboras & Danios
Rasboras, danios and White Cloud Mountain Minnows. Compare adult space, temperature and group needs, then check each individual or pack offer.
- Shrimps & Crustaceans
Compare Cherry, Amano, Caridina and filter-feeding shrimp, plus crayfish and crabs. Match housing, food, adult space, supplied size and sale unit.
- Freshwater Snails
Shop freshwater aquarium snails in the UK. Compare current species, adult size, water needs, diet, breeding risk, compatibility, prices and availability.