Only Selcon Concentrate™ contains Omega-3 HUFA, Vitamin B12 and pure stabilized Vitamin C. So if you are establishing a saltwater breeding program, preventing/reversing lateral line disease or just maintaining a healthy reef system, try Selcon; it's truly amazing. - Excellent for reef aquaria - Filters may be kept running - Will not alter water chemistry - Excellent for soaking freeze-dried foods - Does not contain Yeast, Phosphates, or Nitrates - For marine use only - Use several times each week for best results Ingredients: Selco Highly Unsaturated Fatty Acids; Marine lipids 200 mg/g.; Vitamin C stabilized 200mg; Vitamin b12 Cyanocobalamin 240 mcg. Directions: Soak any type of freezed-dried or frozen food with .5 ml Selcon Feed 1.0 ml Selcon to portion of live brine shrimp to greatly enhance thier nutritional quality. For invertebrate aquaria, add at the rate of .5 ml Selcon per 50 gallon aquarium.