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i was thinking of makeing a kinda cold water asian them moutian stream. but the thing is i wonder if u could do one with a rainbow trout..... it would have diff types of hillstream loaches and like 1 or 2 rainbow trout do u guys see anything wrong with my idea?

You mean other than the hillstream loaches likely to become expensive feeder fish for your trout?

it would have diff types of hillstream loaches and like 1 or 2 rainbow trout do u guys see anything wrong with my idea?

They can get a bit large.

lol yea well it would mainly just be a grow out tank for like 2 trout then i would get them a larger tank before they start eating the hillstrems or should i just put the hillstream loaches in and wat other fish can take very fast water with out stressing them or killing them?

Why would you want to keep something so large, you're never going to be able to house it properly, and it will easily end up on the floor or KOd because it hit the lid. They need HUGE tanks to swim in, its like keeping a huge tiger barb. The young will also eat hillstream loaches. There is a reason farms keep them in lakes or huge vats.
Snakeheads are a more realistic option.

Yes to the snakeheads, except for the fact they're illegal in the US now. Although they probably wouldn't like water that was too fast.

Depends on how fast you're talking with what fish can live in fast water. I expect white clouds would take fast water to a certain degree. I hear Hemiodus are pretty good with fast water. As far as most fish go, though, when you get really fast you're only looking at bottom feeders like hillstream loaches and certain plecs and catfishes; anything with a sucker adaptation is fairly good for a fast-water aquarium.

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White clouds are a definite yes. I had a river tank set up for a couple of years with white clouds and hillies.

That trout is very rare as far as size goes no way would a RB Trout grow to that size in a home tank no mater how big it was.
They can grow very big if there is plenty of natural food and perfect water conditions.
I have seen several bigger in the wild but they are far and few in between.

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Keith

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Very true, Keith, but you could say the same for something like the iridescent shark. In the wild, they reach up to 4 feet and 100 pounds, something that's just not going to happen in normal tank conditions. All the more reason fish like that should simply be kept out of home aquaria.

the arizona desart museame has a larger sized rainbow trout in a fish tank on display it looks so great!

Id beg to differ actually.
I think the RB trout would grow LARGER than that in the wild, but will die very early.
Coupled with the constant diet as opposed to dropping off periods of feeding in the wild, and the added heat to increase motabolizam, i think they'd grow huge in a big tank, then die.

Rainbows are pretty sensitive to warmer temperatures. They'll start to die around 70 F. You're probably right about the diet, but the size of the tank it would take to grow out a trout that big is staggering.