| Can Cardinal Tetras be mixed with Rainbowfish?
I ask because even though both species are peaceful, the cardinals prefer SOFT water and I think the rainbow prefer HARD water.
The rainbows seem to be doing well and they are eating a lot when I feed them. However, whenever Ihad cardinals, they never seem to survive....does this have to do with the water being too hard for them?
Any advice? Thanks! |