~ jan wrote:

Deeper is better in places that get hot (or cold, though a heater can
negate that). A patio umbrella may be necessary on those really hot days.


In Arizona, when it gets too hot(over 115F), people have been known to
put 300lb blocks of ice in their pool for comfortable swimming. Do Koi
like ice?

I plan a 12' dia deck island over my pond for both shade and heron
protection.

Chip