are those rbta. they look kinda ineed of light or food.
i like how the rocks are kind of curves ( lota room in center . no room on sides ) from the front glass . very slight but it is there. lots of people just make a flat reef wall or stacken all exactly the same distance from front glass
Yes those are RBTA there is actualy 3 do to splitting but they are well fed and have looked like that since I bought the first one, my lights are 2-150 HQI Metal Halides and 2- blue acitinic have been thinking about upgrading to 3-150 MH and 4-96w blues