Thanks for the comments. It freezes over in winter except for the waterfall and down by the skimmer box where I put a stock tank de-icer. The fish all stay in there and huddle at the bottom. As long as the top doesn't completely freeze over so there can be some surface exchange everything is just fine. The fish stop getting fed once the temp reaches a certain point because they can't digest the food.
All matter is merely energy condensed to a slow vibration, we are all one consciousness experimenting itself subjectively, there is no such thing as death life is only a dream which is an imagination of ourselves. Bill Hicks
ua hua's 90 gal. high tech
ua hua's 5,000 gal. water garden