Aquarium fish: choosing and caring for your animals
Start with the aquarium, then choose fish that suit it. Plan adult space needs, compatible tank mates, equipment and ongoing maintenance.
Prepare your home and care routine
Prepare and establish the aquarium before bringing fish home. Research filtration, water testing and temperature requirements for your chosen species. Set up a maintenance routine and ask a knowledgeable aquatic specialist about introducing new fish. Choose equipment around the animals’ needs rather than the appearance of the tank.
Further reading: RSPCA aquarium planning guidancePlan your ownership budget
Get local estimates for equipment and services before committing. Include these costs in your plan:
- Setup: aquarium, secure stand, filtration and species-appropriate equipment.
- Routine costs: food, water testing, maintenance supplies and electricity.
- Reserve funds for equipment failures, specialist help and safe transport.
Choosing aquarium fish
Identify the exact species and its adult size before choosing fish. Compare its water and space requirements with your aquarium, and research compatibility with existing tank mates. A fish that is small at purchase may need much more space as it grows.
Browse aquarium fish for sale