I posted this here, not to get one most expert answer, but for largest possible response. What foods are you feeding?
Dry catfish or other agricultural or pond food
Aquarium flake blend, like Tetra
Freeze dried aquarium blend
Spirulina flake
Sinking fish food pellets
Dried aquarium seaweed, like Two Little Fishies
Dried HUMAN seaweed, like nori from Aisian food store
Freeze dried whole species, like Tubifex or blood worms
Frozen blend, like Ocean Nutrition
Frozen whole species, aquarium foods, like brine shrimp, grated or whole pieces
Frozen whole species, HUMAN foods, like shrimp or fish, grated or whole pieces
Live, like brine shrimp
Do It Yourself blended home recipe, WITHOUT vegetables
Do It Yourself blended home recipe, with vegetables
Dry catfish or other agricultural or pond food
Aquarium flake blend, like Tetra
Freeze dried aquarium blend
Spirulina flake
Sinking fish food pellets
Dried aquarium seaweed, like Two Little Fishies
Dried HUMAN seaweed, like nori from Aisian food store
Freeze dried whole species, like Tubifex or blood worms
Frozen blend, like Ocean Nutrition
Frozen whole species, aquarium foods, like brine shrimp, grated or whole pieces
Frozen whole species, HUMAN foods, like shrimp or fish, grated or whole pieces
Live, like brine shrimp
Do It Yourself blended home recipe, WITHOUT vegetables
Do It Yourself blended home recipe, with vegetables