Yes I tie. My tank isn't big enough to try patterns though. I have used fly tying hooks to remove bad tank mates before though. A small hook and a mysis shrimp was able to pull out a purple dottyback.
I'm blessed enough to have very good trout fishing within a stones throw from my front door. My house sits next to a small mostly wild trout stream, brookies, rainbows and browns.
The bigger browns range around 20" to 26", but there are rumored 30" fish around.
I'm also 10 miles away from casting to big Landlocked Atlantic Salmon, this girl was around 29".