Oh my!  We got 28 goldfish in our 450 gallon tank pond and they turn into little piggies when we feed them with these sticks.  I've read some other reviews that say this food will tint your white fish a bit yellow.  I can say that yes some of my fish to get a yellowish tint, while some do not.  I am using less and mixing with other foods to reduce the yellowing.  Although I don't really mind and neither do the fish.