1. Weekly tank maintenance
2. No carbon in my filter
3. Hikari Specialists' Fish Food Cichlid Bio-Gold
4. Reef Plus Concentrated Vitamin and Amino Acid Supplement
First, I perform a 10 percent water change and a vacuum of the gravel WEEKLY.
Second, I do NOT put carbon in my filter. When I put carbon in my filter, my oscar started getting spots on his head. After I removed the carbon from the filter, my oscar's head cleared up.
Third and Forth, I feed my oscar Hikari Cichlid Bio-Gold pellets, which I soak in a concentrated vitamin and amino acid supplement. This combination is VERY high in protein and vitamins.