So I found this little creek in a suburban area today while I was biking. It's been a rough go lately and it was as close to nature as I'm gonna get anywhere around here so I went off the trail and down to the creek and while I was laying around I noticed there were actually little fish in a few sections of the stream. The further up stream went the smaller they got (not that they were big, 1.5" max). I thought it would be really cool to set up a medium size tank and put some of these guys in there using some of the small rocks, sand, water, moss and other plants and throw a light powerhead in there to create their natural flow. I didn't for a few reasons, no empty tanks atm, I'd go back and study them quite a bit before I seriously consider doing this, and mostly I was concerned it was simply wrong to do. I'm something of a hippie what with the long hair and big beard and I thought that it might be somewhat hypocritical of me to take from an already shrinking environment because of all the building and construction in the cities around my home. I know all of our fish are in some way or another linked to the wild and I'm not saying keeping fish all together is bad but I'm wondering if I should refrain from doing this because the lack of real nature in this part of California (Bay Area/Tri Valley). Anybody have an opinion or advise? I'm open to all opinions or facts. I just want to be sure I'm not doing something wrong. Thanks.