I hope someone can help. I have 3 goldfish fry about a month old. Last weekend they were all swimming and eating normally - scavenging for food at the bottom etc. I started to notice the two smaller fry were swimming around the perimeter of the tank at the top and zipping along the surface in a funny manner, they were not going down lower in the tank very much. I spoke with my local store and was told I may have a dominance issue with the largest of the fry - which has become so much larger seemingly overnight - it looks 3x larger that the other two. The store instructed me to buy a divider as the other two might be frightened and bullied by the larger one and might take a couple of days to recover. I installed the divider this morning and have been watching their behaviour the two small ones are simply staying at the top - I noticed one of them trying to go down and seeming to be pulled back up. I have been doing daily 25 per cent water changes siphoning off excess food daily, I am feeding them spirulina softened up and mixed with their water, and alternating that every couple of days with soaked flakes. They were eating either of these foods regularly and easily. All of the chemical levels are exactly where they are supposed to be. I have a breeder sponge filter, 10 gallon tank, no media on the tank bottom. I have fed other gold fish peas before and that has helped with buoyancy issues - however I am not sure how I can get them to eat it if they cannot go down to get it. I treat the water with Stability and Prime. I really don't want these two babies to die any suggestions please?