They can be left in the tank until all eaten up, they do not cloud the water unlike other brands. 12 oz. Spirulina, Algae, Veggie Wafer Disc Zeigler Algae Discs is a complete and well balanced, sinking diet for aquatic herbivores such as Plecos and Algae-Eaters. The highly digestible ingredients come from an array of plant sources plus several marine products to increase palatability, digestibility and coloration. Wheat Germ, high levels of stable Vitamin C, and Brewers Yeast are included to promote healthy gill, fin and tissue development. Plus this diet has been formulated to reduce waste and increase water clarity. IngredientsFish Meal, Wheat Rice Flour, Wheat Bran, Dehulled Soybean Meal, Wheat Germ Meal, Spirulina, Dicalcium Phosphate, Dehydrated Alfalfa Meal, Carrot, Celery, Beet, Parsley, Lettuce, Water Cress, Spinach, Dried Brewers Yeast, Soy Lecithin, Pea by-product Meal, Dried Kelp, Shrimp Meal, Krill Meal, L-Lysine, various minerals and supplements. Guaranteed Analysis Crude Protein Minimum 30.0% Crude Fat Minimum 7.5% Crude Fiber Maximum 4.0% Moisture Maximum 10.0% They can be left in the tank until all eaten up, they do not cloud the water unlike other brands. Product SpecificationsParticle Size: DiscPackaging: 8 oz. bag