While we're asking for inputs on wintering, what about this?

Should I turn OFF my waterfall at some point?

3000gal pond with 8 comets and 1 koi. Deepest point is approx 2feet. I'm a
zone 6a or 6b (???)....

Input?

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john burton
Bach 50B3
Bass Trombone, Charleston NeoPhonic Orchestra
South Charleston, West Virginia