I recently picked up a 2 or 3 year old RBTA from a guy. I have only had it in the tank for about 2 weeks. Seems to be very healthy and my clowns are very happy. However, I had a few questions. First mine has a bright green base with bright red tips. I guess I wanted to know if there are different species of RBTA. I have seen all red. Second what is a typical period or what is required for the RBTA to actually bubble its tips.