Starting your first tropical aquarium is an exciting step into one of the world’s most rewarding hobbies. However, with thousands of freshwater fish species available, choosing the right ones for your first aquarium can feel overwhelming.
The good news is that many tropical fish are incredibly hardy, peaceful and forgiving, making them ideal for beginners. By selecting species that are easy to care for and compatible with one another, you’ll enjoy a colourful, active aquarium while building your confidence as a fishkeeper.
In this guide, we’ve rounded up 20 of the very best tropical fish for beginners, including care tips, ideal tank sizes and compatibility advice to help you choose the perfect community aquarium.
What Makes a Good Beginner Fish?
The best beginner fish should be:
- Hardy and adaptable
- Peaceful with other species
- Easy to feed
- Resistant to common diseases
- Readily available
- Suitable for community aquariums
- Comfortable in standard tropical water conditions
Before introducing any fish, always ensure your aquarium has completed the nitrogen cycle and that water parameters are stable.
1. Neon Tetra (Paracheirodon innesi)
One of the world’s most recognisable aquarium fish, the Neon Tetra is famous for its brilliant blue stripe and vibrant red body.
These peaceful shoaling fish look spectacular when kept in groups and are perfect for community aquariums.
Adult Size
3–4 cm
Minimum Tank Size
60 litres
Temperature
22–26°C
Keep In Groups?
Yes – six or more.
Beginner Rating
★★★★★
2. Harlequin Rasbora (Trigonostigma heteromorpha)
Harlequin Rasboras are peaceful, hardy and constantly active.
Their copper body and distinctive black wedge marking make them attractive additions to any planted aquarium.
Adult Size
4–5 cm
Minimum Tank Size
60 litres
Beginner Rating
★★★★★
3. Cherry Barb (Puntius titteya)
Cherry Barbs are peaceful schooling fish that develop rich red colours, particularly the males.
They’re much calmer than many other barb species.
Adult Size
5 cm
Minimum Tank Size
75 litres
Beginner Rating
★★★★★
4. Platy (Xiphophorus maculatus)
Platies are colourful livebearers available in dozens of colour varieties.
They’re hardy, peaceful and easy to breed.
Popular colours include:
- Red
- Sunset
- Mickey Mouse
- Blue
- Coral
- Tuxedo
Adult Size
6 cm
Minimum Tank Size
60 litres
Beginner Rating
★★★★★
5. Guppy (Poecilia reticulata)
Few freshwater fish offer as much colour as Guppies.
Available in hundreds of strains, they remain one of the best beginner fish available.
Adult Size
4–6 cm
Minimum Tank Size
60 litres
Beginner Rating
★★★★★
6. Honey Gourami (Trichogaster chuna)
Honey Gouramis are peaceful centrepiece fish with beautiful golden colouring.
Unlike some larger Gouramis, they’re generally calm and ideal for community aquariums.
Adult Size
5–6 cm
Minimum Tank Size
60 litres
Beginner Rating
★★★★★
7. Zebra Danio (Danio rerio)
Zebra Danios are energetic, playful fish that are exceptionally hardy.
They’re often recommended for first-time fishkeepers because they tolerate a wide range of water conditions.
Adult Size
5 cm
Minimum Tank Size
75 litres
Beginner Rating
★★★★★
8. Corydoras Catfish (Corydoras Spieces)
These charming bottom-dwelling catfish spend their day searching for food among the substrate.
Popular species include:
- Bronze Corydoras
- Panda Corydoras
- Peppered Corydoras
- Sterbai Corydoras
Adult Size
5–7 cm
Minimum Tank Size
75 litres
Keep In Groups?
Yes – at least six.
Beginner Rating
★★★★★
9. Black Neon Tetra (Hyphessobrycon herbertaxelrodi)
Often overlooked in favour of traditional Neon Tetras, Black Neons are actually even hardier.
Their striking black stripe contrasts beautifully with planted aquariums.
Adult Size
4 cm
Minimum Tank Size
60 litres
Beginner Rating
★★★★★
10. Glowlight Tetra (Hemigrammus erythrozonus)
Glowlight Tetras feature a stunning orange stripe that appears to glow under aquarium lighting.
They’re peaceful, hardy and ideal for beginners.
Adult Size
4 cm
Minimum Tank Size
60 litres
Beginner Rating
★★★★★
11. White Cloud Mountain Minnow (Tanichthys albonubes)
Although technically subtropical rather than tropical, White Clouds are incredibly hardy.
They’re perfect for cooler aquariums and beginner fishkeepers.
Adult Size
4 cm
Minimum Tank Size
60 litres
Beginner Rating
★★★★★
12. Swordtail (Xiphophorus hellerii)
Swordtails are active livebearers with a distinctive elongated tail.
They’re colourful, robust and available in numerous varieties.
Adult Size
10–12 cm
Minimum Tank Size
90 litres
Beginner Rating
★★★★☆
13. Molly (Poecilia sphenops)
Mollies are lively community fish that also graze soft algae throughout the aquarium.
Popular varieties include:
- Black Molly
- Dalmatian Molly
- Balloon Molly
- Lyretail Molly
Adult Size
8–10 cm
Minimum Tank Size
90 litres
Beginner Rating
★★★★☆
14. Rummy Nose Tetra (Hemigrammus rhodostomus)
Known for their vivid red noses and synchronized schooling behaviour, Rummy Nose Tetras create one of the most impressive displays in a community aquarium.
Adult Size
5 cm
Minimum Tank Size
90 litres
Beginner Rating
★★★★☆
15. Emperor Tetra (Nematobrycon palmeri)
These elegant tetras feature shimmering blue bodies and long flowing fins.
They make excellent centrepiece fish in peaceful communities.
Adult Size
5 cm
Minimum Tank Size
75 litres
Beginner Rating
★★★★☆
16. Bristlenose Pleco (Ancistrus Species)
Unlike the enormous Common Pleco, Bristlenose Plecos stay relatively small.
They also help graze algae from glass and decorations.
Adult Size
12–15 cm
Minimum Tank Size
90 litres
Beginner Rating
★★★★★
17. Bolivian Ram (Mikrogeophagus altispinosus)
Bolivian Rams are peaceful dwarf cichlids with attractive colours and interesting personalities.
They’re considerably hardier than German Blue Rams.
Adult Size
8 cm
Minimum Tank Size
90 litres
Beginner Rating
★★★★☆
18. Pearl Gourami (Trichopodus leerii)
Pearl Gouramis are among the most beautiful freshwater fish available.
Their peaceful temperament makes them excellent centrepiece fish.
Adult Size
10–12 cm
Minimum Tank Size
125 litres
Beginner Rating
★★★★☆
19. Kuhli Loach (Pangio kuhlii)
These eel-like fish spend much of their time exploring the substrate and hiding among decorations.
They’re fascinating additions to peaceful aquariums.
Adult Size
8–10 cm
Minimum Tank Size
75 litres
Keep In Groups?
Yes – five or more.
Beginner Rating
★★★★☆
20. Dwarf Neon Rainbowfish (Melanotaenia praecox)
If you’re looking for colour and constant activity, Dwarf Neon Rainbowfish are difficult to beat.
Their shimmering blue bodies and bright red fins make them real showpieces.
Adult Size
6–8 cm
Minimum Tank Size
90 litres
Beginner Rating
★★★★☆
Which Fish Should Beginners Avoid?
Some fish are better left until you’ve gained more experience.
These include:
- Discus
- Flowerhorn Cichlids
- Oscars
- Common Plecos
- Bala Sharks
- Red Tail Sharks
- Green Spotted Puffers
- Clown Loaches (due to their adult size)
- Freshwater Stingrays
While these species are fascinating, they require more specialised care or grow far too large for most home aquariums.
Can These Fish Live Together?
Many of the fish listed above make excellent community aquarium companions.
For example:
60–90 Litre Aquarium
- 10 Neon Tetras
- 6 Corydoras
- 1 Honey Gourami
90–125 Litre Aquarium
- 12 Harlequin Rasboras
- 8 Corydoras
- 1 Bristlenose Pleco
- Pair of Honey Gouramis
125–180 Litre Aquarium
- 15 Rummy Nose Tetras
- 8 Corydoras
- 6 Kuhli Loaches
- Pair of Pearl Gouramis
Always research compatibility and avoid overstocking your aquarium.
Essential Equipment for Beginner Tropical Fish
To keep tropical fish healthy, you’ll need:
- Aquarium
- Aquarium cabinet or stand
- Quality filter
- Adjustable heater
- LED lighting
- Water conditioner
- Liquid water test kit
- Thermometer
- Gravel vacuum
- Fish net
- High-quality tropical fish food
Investing in reliable equipment from the start makes fishkeeping much easier.
Feeding Beginner Tropical Fish
Most community fish thrive on a varied diet.
Good options include:
- Tropical flakes
- Micro pellets
- Frozen bloodworms
- Brine shrimp
- Daphnia
- Algae wafers for bottom dwellers
Feed only what your fish can consume within two to three minutes.
Overfeeding is one of the most common causes of poor water quality.
How Many Fish Should You Buy?
Introduce fish gradually.
A good approach is:
- Add your first small shoal.
- Wait one to two weeks.
- Monitor water quality.
- Add another group.
This allows your biological filter to adapt safely.
Common Beginner Mistakes
Avoid these common pitfalls:
- Adding fish before the aquarium has cycled
- Buying incompatible species
- Overstocking
- Overfeeding
- Skipping weekly water changes
- Choosing fish based solely on appearance
- Purchasing Common Plecos for small aquariums
A little planning goes a long way towards building a successful aquarium.
Final Thoughts
Choosing hardy, peaceful fish is the easiest way to ensure success with your first tropical aquarium. The species featured in this guide are not only colourful and fascinating to watch, but they’re also forgiving of the small learning curve that comes with starting a new aquarium. By selecting compatible fish, maintaining good water quality and carrying out regular maintenance, you’ll create a vibrant community aquarium that can be enjoyed for many years.
Remember that patience is one of the most important skills in fishkeeping. Take your time stocking your aquarium, allow your filter to mature, and always research new species before introducing them. Your fish will reward you with healthier lives, brighter colours and more natural behaviour.
At Charterhouse Aquatics, we stock a huge range of tropical fish, complete aquarium kits, filters, heaters, LED lighting, fish foods, water treatments, decorations, live plants and maintenance equipment from leading brands including Fluval, Oase, Juwel, Aquael, SuperFish, API, Seachem, JBL and more. Whether you’re setting up your very first aquarium or expanding an established community tank, our expert team is always on hand to help you choose the right fish and equipment.
