Best Fish Tanks & Aquariums — 19 Litre (2026)
1 fish tanks & aquariums matching capacity “19 Litre”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our How to Care for & Maintain Your Fish Tanks & Aquariums guide.
Choosing a 19 litre fish tank or aquarium is a great starting point for any aspiring aquarist. This size offers enough space to comfortably house smaller freshwater fish and invertebrates, providing an ideal environment for observation and learning about the basics of aquatic life. A 19-litre tank allows you to establish a stable ecosystem without overwhelming your chosen inhabitants. It’s a manageable size for beginners, offering sufficient room for growth while remaining relatively simple to maintain.
#1 Pick
Fluval SPEC Aquarium Kit, Aquarium with LED Lighting and 3-Stage Filtration System, 5-Gallon- 19 Litre
£107.85
Pros
- Compact 5-gallon (19-litre) footprint suits desks and small living spaces
- Integrated 3-stage filtration and LED lighting come built in, ready to run
- Sleek anodized aluminium trim gives a more premium look than typical starter kits
Cons
- Small capacity limits stocking to nano fish, shrimp or a betta
FAQ
What fish are suitable for a 19 litre aquarium?+
Small, peaceful fish like neon tetras, white cloud minnows or guppies thrive in this size of tank. Overcrowding is a significant issue, so limit your stock to no more than six small fish – consider invertebrates like snails as well to help maintain the ecosystem.
What equipment do I need for a 19 litre aquarium?+
You’ll need a tank of course, along with a filter (essential for maintaining water quality), an air pump (to increase oxygen levels), substrate (gravel or sand), and decorations like rocks and plants. Don't forget a thermometer to monitor the temperature.
How often should I clean my 19 litre aquarium?+
Regular partial water changes are crucial. Aim for 20-30% weekly, or every two weeks depending on your stock levels and how well your filter is working. Avoid cleaning the entire tank at once as this disrupts the beneficial bacteria.
What kind of lighting do I need?+
A basic LED light designed for planted tanks or aquariums will suffice. Aim for 8-12 hours of light per day to promote plant growth and enhance your fish’s colours, but avoid excessive bright lights which can stress the inhabitants.
What temperature should I maintain in my aquarium?+
Most tropical freshwater fish prefer a water temperature between 24°C and 28°C (75°F – 82°F). Use an accurate thermometer to monitor the temperature and consider a heater if your room temperature fluctuates significantly.
How do I cycle my aquarium?+
Cycling is the process of establishing beneficial bacteria that break down harmful ammonia and nitrite. This typically takes 4-8 weeks, using an ammonia source to start the process – research ‘fishless cycling’ for detailed instructions.
What kind of substrate should I use?+
Gravel or sand are both suitable substrates. Choose a size appropriate for your fish and consider adding root tabs if you plan to keep live plants in the tank – these provide nutrients for plant growth.
Are snails good additions to a 19 litre aquarium?+
Yes, snails are excellent additions! They help control algae blooms and consume uneaten food. Mystery snails or nerite snails are popular choices that won't reproduce rapidly in a smaller tank.
How do I add fish to my new 19 litre aquarium?+
Acclimate your new fish slowly by floating the bag they came in for about 30 minutes, allowing them to adjust to the water temperature. Then gently release them into the tank – avoid pouring the water directly onto their delicate fins.
What are some good plants for a 19 litre aquarium?+
Java moss, Anubias and Hornwort are hardy plants suitable for beginners. They provide hiding places for fish and help oxygenate the water, creating a healthier environment within your 19-litre tank.