Fishes In Lotus Pond

[coolfishfan]

I have a few guppies and lyretail mollies in my lotus pond.
These fishes complement each other very well.
 
There is no aeration.  I never feed them. They thrive on mosquito larvae and algae.
 
I want to add a little more variety in this pond.
Just need to know what else(non-aggressive) can thrive in this environment.

 

[fluttermoth]

How big is your pond? And how deep?

 

[coolfishfan]

4 feet wide and 2 feet deep

 

[daizeUK]

That's probably about 150 to 190 gallons assuming a roughly circular pond.

 

[coolfishfan]

not sure of measurement in gallons......