So I come home from work tonight, and find my ghost shrimp feasting on a cardinal tetra of mine!! It was really disgusting to say the least. Do you think the shrimp killed it, or is it more likely the tetra died on its own? All my paremeters are good, except for a high pH in the 8's that I have to work on fixing... I don't know if this might mean anything, but I also did notice a little bit of foam forming on the top edges of the tank that i never saw before.