Small fish that can be suitable for container ponds if conditions are right include mosquito fish, Japanese rice fish, guppies, and southern platys, all of which typically grow to less than 2.5 inches in size.

How do you start a container pond?

What to do

  1. Choose a spot. Your pond will want light, but not full sunlight all day. …
  2. If the container isn’t watertight, e.g. an old plant pot, then add a piece of pond liner.
  3. Add a layer of gravel and rocks. …
  4. Fill your pond. …
  5. Start planting! …
  6. Now watch and wait!