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So I got 5 Cardinal Tetras to go along with the 5 danios.. small but very vivid colour.

Small enough that I lost 2 getting sucked into the water pump!

So I got 5 more, total of 8, and put a foam around the pump intake.

Well now I'm down to 3 tetras, and I can only think the Danios must be eating them, because I never see a body, and there's nowhere for them to hide.

I thought Danios were active but didn't eat other fish?

I've seen them chase the tetras a bit at first, but since then they seem to just leave each other alone, especially after I went up to 8.

Though it seems the tetras never eat well either, I put flake and pellet food in and the Danios are active enough they beat them to the food.. the tetras will eat stuff that's falling down but it hardly seems like it's enough when I watch.

The tetras also seem to have to swim a lot, I think the water pump sets up a lot of current in the tank, maybe they're just getting too warn out.

Maybe they're just starving to death and then the Daios eat them?

I guess I'll let the last 3 get eaten and just get more Danios for the tank.