first off thanks for reading this! I have had a couple of bettas over the last few years.neither one made it more than like 6 months.for a little set up info---i kept both in a 2g unfiltered unheated tank. i did 100% water changes weekly.they were fed ocean nutrition betta food.one was purchased from my lfs the other the wife got me from a pet supply store.the first one(pet supply store) i wrote off as probably a poor quality fish,thus i purchased the second from the lfs.thinking it might be higher quality.well he lasted only a few months as well.so thee question is what am i doing wrong? i thought i had some decent info on keeping them.and they both just seemed to slowly get worse and worse until they died.i would really like to keep a betta but i am becoming frustrated and dont want to keep more bettas if i am the cause of their demise.well thanks for reading my long winded rant and any replies info is greatly appreciated!!!