You will probably have a difficult time finding info on the internet about this fish, since it goes by so many "common" names. It sometimes is referred to as a Red Shiner. However, don't confuse it with the Rainbow Shiner, which is an altogether different fish. I can give you more detailed info later today, but rest assured this fish, along with other dace such as the the southern red belly (http://www.nanfa.org/fif/srdace.shtml
), is an excellent choice for a planted aquarium, as are most native fish. Don't worry about the temparature too much. This fish isn't technically a cold-water species, because it can be found all the way down into FL. However, I don't think it will die in your Houston winters, since I'm pretty sure it's habitat goes pretty far north above TN, and our winters are probably just like yours. It will tolerate a heated tank very well, as long as you don't crank it up to 80 or so. Also, keep in mind this fish is probably in mating colors right now, and for the majority of the year will be a rather dull, pinkish metallic color.