TetraFin Gold Japan - Complete, premium sinking food for fancy goldfish. Specifically for fancy goldfish, Gold Japan contains the very best ingredients available and is designed to sink to make it easier for these fish to eat. Rich in high-quality proteins, colour enhancers and vegetable ingredients, it will keep your fancy goldfish in top condition. Because the fish do not need to come to the surface to feed, Gold Japan also helps to reduce swimbladder problems.