Cardinals dying 1 by 1
#1
Hi,
So i bought 9 cardinal tetras from the LFS, sadly since having them one goes off alone and dies, i remove the dead body, another does the same. I am now down to 6 cardinals and 1 again is on its own. whats going on :( my params are fine
Ammonia 0
Nitrite 0
nitrate 10
GH 60 PPM
Temp 28 Celsius
EDIT: they are with 6 cherry barbs, 9 zebra danios and 1 dwarf gourami, no bullying going on at all