Hi,

I've just set up a new 20 gallon tank with the intention of keeping more
goldfish... but cichlids caught my interest when I read that some kinds can
be kept in a small tank. I am completely new to them, so I don't know what
their requirements are. The tank is cycling now with a penguin 125
bio-wheel filter and some gravel. I am looking for a single fish or maybe a
pair of 20 gallons is big enough, something tame and good to interact with.

What kinds of cichlids should I look for?

Thanks