Male betta fish (Betta splendens) are intelligent, colourful fish that thrive when given a warm, clean, and well-maintained aquarium. Although they are often sold in small containers, they require a properly equipped tank to live a healthy and active life.

Tank Size
Minimum: 20 litres (5 US gallons)
Recommended: 30–60 litres for the best quality of life
Larger tanks provide more stable water conditions and allow for natural behaviour.
Water Temperature
Ideal: 25–27°C
Use a reliable aquarium heater and thermometer.
Avoid sudden temperature changes, as these can cause stress and illness.
Filtration
Use a gentle filter with a low flow.
Bettas have long fins and can struggle in strong currents.
Sponge filters or adjustable-flow filters are excellent choices.
Water Parameters
pH: 6.5–7.5
Ammonia: 0 ppm
Nitrite: 0 ppm
Nitrate: Below 20 ppm
Regular water testing helps keep these levels safe.
Water Changes
Change 20–30% of the water every week.
Always treat new tap water with a water conditioner to remove chlorine and chloramine.
Vacuum the substrate during water changes to remove waste.
Aquarium Setup
Include:
Live or silk plants
Hiding places such as caves or driftwood
Smooth decorations without sharp edges
Floating plants to provide shade
A secure lid, as bettas are excellent jumpers
Lighting
Provide 8–10 hours of light each day.
Too much light can encourage algae growth.
A timer helps maintain a consistent day/night cycle.
Feeding
Feed a high-quality betta pellet as the staple diet.
You can also offer:
Frozen or live bloodworms
Brine shrimp
Daphnia
Feed once or twice daily, only as much as your betta can eat in around two minutes. Remove any uneaten food.
Tank Mates
Male bettas are territorial and should never be housed with another male betta OR FEMALES PERMANATELY)
Suitable tank mates in a large, well-established aquarium may include:
Peaceful snails
Amano or larger shrimp (though some bettas may chase them)
Small peaceful fish that are not brightly coloured or fin-nipping
Always monitor introductions carefully, as each betta has its own temperament.
Signs of a Healthy Betta
A healthy male betta should:
Swim actively and explore the aquarium
Eat eagerly
Display vibrant colours
Have fully open fins with no tears or rot
Build bubble nests (this is a normal breeding behaviour and often indicates the fish feels comfortable)
Common Health Problems
Watch for:
Fin rot
Ich (white spot disease)
Swim bladder issues
Velvet disease
Fungal infections
Good water quality is the best way to prevent most illnesses.
Lifespan
With proper care, a male betta typically lives 3–5 years, though some can live even longer.
Quick Care Checklist
✅ Minimum 20-litre aquarium
✅ Heater set to 25–27°C
✅ Gentle filtration
✅ Weekly 20–30% water changes
✅ High-quality betta diet
✅ Plenty of plants and hiding places
✅ Secure lid to prevent jumping
✅ Test water regularly
Providing warm, clean water and a well-decorated aquarium will help your male betta display its best colours, remain active, and enjoy a long, healthy life.