Choice of feed
The quality of food influences the health, colours and longevity of fish. Varying between dry, frozen and live is the best strategy.
Detailed explanation
Quality brands (Hikari, New Life Spectrum, Sera, JBL) use better ingredients than cheap feeds. Granules are better than flakes.
Frozen food (bloodworm, Artemia, mysis) is the ideal complement 2-3 times a week. Live food is the best but most challenging.
The rule: give only the quantity consumed in 2-3 minutes. Weekly fasting is beneficial for digestion.