I agree with the mahseers. They get to a good size, very active and non aggressive. Also I don't think they'd go after smaller schooling fish. Maybe someone else could come in on that last part.That office building/pond looks very similar to one in San Diego. They do not have anything in it but has some very nice plants along it. I think it will make a very nice pond for kois/fancy gold fish. Mahseers is good too but not as colorful.
Truthfully I'm guessing a bit on temp, based on the old pond. The filtration is all outside and the inside air is kept around 70 year round. It gets a fair amount of sun from the large windows and skylights.is the 65 degree taken from the water temp or air temp?? i only ask because my tank out side in an uninsulated wooden shed alway sits about 5' above the air temp
turtles require ALOT of filtration that turtle tank smell doesn't do it for most office spaces plus the sliders would end up getting out and strolling through the office everywhereHow about aquatic turtles? I think it'd be awesome to walk in and see some sliders chilling on a log in the middle of that.