Betta Fish

Planning your aquarium

The library starting point is 5+ US gallons. Plan for the approximate 3-inch adult size and the species' normal activity, not just its current shop size.

The minimum group count is not a compatibility recommendation; assess temperament, sex, territory, and tankmates.

Mixed-species aquariums may need substantially more space. Tank length, adult behavior, filtration, and hiding spaces all matter.

Tank setup and behavior

• Maintain stable, species-appropriate water and provide a mix of cover and swimming room.

Offer easy access to the water surface, gentle flow, broad-leaved plants and resting spots near the surface.

Usually kept alone or with carefully chosen peaceful tankmates.

Food and feeding

Food options: Betta pellets, Frozen brine shrimp, Frozen daphnia.

Use small portions of a complete betta food and vary the diet with suitable insect-based frozen or live treats.

Use appropriately sized, complete staple foods and rotate suitable foods for variety. Feed modest portions and remove uneaten food.

Additional care caution

Avoid housing adult males together. Each betta has an individual temperament; watch carefully even with usually peaceful tankmates.

Tankmate cautions in the checker

• Avoid or investigate Paradise Fish: Both are territorial labyrinth fish and may fight.
• Use caution with Cherry Shrimp: Some bettas ignore adult shrimp, while others hunt them; shrimp babies are especially vulnerable.
• Avoid or investigate Tiger Barb: Tiger barbs are well known for fin-nipping and may harass a betta.
• Avoid or investigate Serpae Tetra: Serpae tetras can repeatedly nip a betta's long fins.
• Use caution with Black Skirt Tetra: Some black skirt tetras nip fins; monitor closely.
• Avoid or investigate Dwarf Gourami: Both can be territorial labyrinth fish and may fight.

These are selected rule-based cautions, not a complete compatibility assessment.