Yes, I have kept Brownies from my local burn in a tank.
At first it was a case of having the tank outside (well, the garage) to keep the temperature down. It was a 6 foot tank (by 2 feet wide and 18" deep), sand and gravel bottom with several large rocks covered in weed (removed from the burn) and a "current" set up by having two very large power filters drawing water from one end of the tank, filtering it and then pushing it back at the other end. I added a power head to agitate the surface as well.
Later on I moved the tank inside with the help of a beer chiller that kept the water between 6 and 15 degrees, depending on the time of year. Trouble is, in a living room thats warm, I used to get a lot of condensation on the tank at lower temperatures.
Feeding was by way of naturals that I caught from the burn by placing a net downstream and shuffling my feet and collecting the bugs. I also fed them worms, the odd maggot, small bits of mussel and also caddis/stoneflys when I could get them.
I never ever fed pellets for the simple reason that trout pellets contain a high percentage of fat/oil that pollutes the water very quickly...and that the fish where 100% wild caught.
After a year I would return the trout, and replace with half a dozen new ones
I also added minnows, a couple of loach I caught and at one stage, an eel..which sulked in the fast flow, so was returned to the burn after a week.
Make sure you have a lid!
Thats about all I can think of just now...but low temperature, flow, filtration and airation are the keys points to success.
You dont need depth, but length and width are important as trout, well, brownies anyway, are very territorial and need to estaplish a "spot" to sit in the current.
Its all very facinating!!
Hope that helps a little.
trout in an aquarium
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