Tropical Fish Compatibility

Question
Hello,

I have a 20 gallon aquarium stocked with 1 medium sized sunset- blushing angelfish and 2 serpae tetra.  Today, I acquired 3 silver tipped tetra (i'm not intending to buy any more fish as I believe this is the limit).  The angelfish is usually very peaceful, but with the addition of the silver tipped tetras, it has gone wild and become very aggressive- and its not even being chased.  I've heard that the new tetra can be very aggressive and I'm concerned about the dynamic between the silver tips and the angelfish.  Do you think things will calm down in a few days and that this could turn out to be an acceptable mix?

Answer
Hello!

In the wild, angelfish eat tetras as a main source of food. They shouldn't really be mixed in aquaria unless you get a small variety of angel and a large variety of tetra. The serpaes are good but the silvers may not.

Also, you kinda HAVE to add more fish. Tetras are schooling fish and should never be in schools of less than 6. I recommend taking the silver tips back and buying 4 more serpaes, they will be fine with the angel.

-Nick