I choke a little when I remember how much I paid for the torch, but then I look at it blowing in the breeze, and for some reason I forget.
I've only my RBTA for 3 weeks I think. "They" say it has nothing to do with lighting, but the BTA was in my tank for about 5 days when I changed my lighting from T5s to MH, it was bubbly when the MH first went on, and changed fairly quickly since. I know some people have BTAs that are bubbly when only actinics are on, and straight when the MHs are on. Mine doesn't change though.