Originally Posted by zanoshanox
Bubbles are best kept under medium lighting, so I keep mine at the bottom because i have halides. For placement, they need medium, but indirect flow. It's a great idea to place them under ledges or cliffs kind of like i did because the lighter amount of flow allows them to fully expand.
Ah ha, I have mine at the top with my MH blaring down on them, could explain a little. Well thanks again!