Trout pond?

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it really just depends on where you live as to the depth of the pond. I have a rainbow trout and brown trout pond in North Carolina that was only about 4' deep in the middle area and around 2-3 round the outsides.
 
I live in Indiana, so it doesn't get too hot for long. I can add cold water when i have to and it will be shaded most of the time. So what about the koi, and can i keep a sterlet in there to?
 
I'd look at a stream like flow with a plunge pool. If someone holds trout in water over 70's I call BS for anyone holding them in those temps. Not for long anyways and most likely not wild and probably not trout.

Water temperature also controls the trout’s metabolism. While very cold water can hold the maximum of dO2 it also slows the trout’s metabolism to the point of suspended animation ( a cryogenic effect ). This is the way it works: from 32 f to 44 f the trout is slowed to the point of needing very little food and he has a over abundance of dO2, up to 30ppm. At 50 f to 55 f the trout’s activity increases and they actively feed for long periods of time and they still have an over abundance of dO2. When the water temperature reaches the 55 f to 65 f range you have the ideal fishing conditions. The trout’s metabolism is in high gear and they feed constantly, dO2 is in the 18 to 12ppm range and there is plenty of food. The food; aquatic insects and their larvae, minnows of all types and crustaceans are prolific and abundant. The fisherman only has to give a proper presentation and he will hook a trout. The great decline starts when the water temperature climbs to 68 f. Brown, Brook and Cutthroat trout start to feel what I call the frying pan effect. Unless there is a lot of turbulence to oxygenate the water, the dO2 falls rapidly to perilously low levels. The trout’s metabolism is racing furiously along and he is burning oxygen as fast as he can adsorb it from the water. As the sun heats the water, he uses the dO2 faster and faster. With out some type of escape valve he will suffocate.

GL
 
Well there will be plenty of O2, a 12' long stream flowing down multiple waterfalls and one large waterfall on the other end of the pond. It will be about 7-8' deep if possible and will be shaded for most of the day. Round pea gravel or slightly larger gravel will be the substrate. I haven't figured out the filtration yet, but there will be lots of plants and a large bog on the side of the pond. Any other suggestions?
 
Already got one. :naughty:
 
Bump :hitting:
 
I have a concrete pond I built with block, 22 feet long, 14 wide, 2.5 deep. Its in almost full shade with a small stream that can be allowed to feed it (or not if water is too warm) PLUS, a well that is on a timer for 1 hour on, then 1 hour off....well water is 52 degrees and in Pennsylvania in the summer, the pond definitely gets to the mid-60's....at that point the fishes survival is touch and go....if ther is a power outage, the fish are dead in 20 minutes as the oxygenating pump is done and so is the cold water supply......I have had many fish kills over thew past 15 years........trout are very hard to keep especially in unnatural conditions........the plus side is they are cheap, and restocking with 12-inchers is only about 3 buicks apiece....
 
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