Hi i have just started up a tropical aquarium, in the 1st few days i had 3 zebra danios alone. Yesterday I added 5 black neon tetras. Since then I have found that one of the zebra danios is acting erratically, chasing and knocking the other zebra danios. And a development in the last few hours is that all the zebra danios are starting to behave like this and are chasing and knocking the black neon tetras too. Should I be concerned?
30 litre tropical biOrb
3 x zebra danios
5 x black neon tetras
30 litre tropical biOrb
3 x zebra danios
5 x black neon tetras