Hi there, I'm new to this site and saw a picture you posted of your tank on one of the threads. I don't have a betta yet but I hope to get one soon. I noticed your air pump and stone, it looks like the same as mine. Why do you put it in a clear tube? Is that to reduce the water agitation? Also, do you have a filter? My tank is about the same size as yours too and the pet shop said a filter isn't necessary if I have a pump. Thanks for your help