Choose resilient fish that can adapt to several water conditions. Hardy fish tolerate modest water parameter changes.
Fishes should fit comfortably in your aquarium and not outgrow it rapidly. Overcrowding causes stress and illness.
Select fish that flourish in your readily maintained water conditions. Find species that can handle moderate pH, temperature, and hardness.
Choose fish that don't need additional illumination, CO2 injection, or filtration. This simplifies and lowers maintenance costs.
Before putting fish in a tank, check their compatibility. Avoid aggressive or territorial fish that hurt tankmates.
Choose fish with easily accessible and manageable nutritional needs. Beginner-friendly fish eat several commercial fish feeds.
Choose captivity-bred fish over wild-caught ones. Tank-bred fish are tougher and more aquarium-adapted.