Brutuscz: There has been a great deal posted about the Bakki Showers and Bacteria House media. An experiment by SMG concluded that lava rock worked just as well. Long term use has not been studied. It is too new. If you use the "search" tool for this forum, you will come up with a great deal. One of the best threads on the subject on any board is one Dick Benbow began entitled "bakki tower". It will give you enough reading for a week, at least.
