We are building a new house and there im planning an outdoor community fish pond, I had one before of 300gal in an oval shape japanese garden style. We will end up contruction of our house in a year. The new pond wil be about 800gal+ it will have two divisions one for larger fish and the other for smaller fish, the space in this pond will let me keep different species that will be impossible to keep in an glass indoor aquarium due to space. This pond wil have Heaters because i plan to keep like I succesfully did in my old house, various species of fish. Arowana, lungfish, cichlids (south american the non aggresive type), stingrays, plecostomus and on the other side angelfish, african clawed frogs, snails, etc
The advantage of doing this in succesfull manner as I did before untill I moved out, is that here in Mexico City we dont have snow cold winters or excesive heat thus having lows at 5 degrees Celcius in Winter and 27 degrees celcius in summer, sometimes 30C. yet at most of the year the temp is at 18C approx.
I know most outdoor ponds have kois, but keeping different species is incredible, yet you have to have the right space, location (shade and sun), and you can enjoy those magnificent fish that most of us keep under a glass aquarium, in a more natural way. Diffrent Species of fish that are not compatible on a glass aquarium are compatible in an outdoor heated pond, requiered you have the knowledge and sufficient care. My last pond of this type had a neutral ph, a temperature of 25C that did vary a little from day to night, but not enough to cause stress to my fish.
As I progress in this I will inform of more details and specs.