I had 3 Glowlight tetras and 3 black neon tetras. I come home and notice that there are spots on my fishes fins research it and found out it was Ich a week ago i started using Rid Ich and so far there is no difference. But the main point of my story is that today all 3 of my Glowlight tetras died. This morning i started to see them go to the top of the surface of the water and they have not been eating. I cant figure out what has happened to them. i need help quick so my other tetras don't suffer the same fate.