I think I might give the red legs a go... I've never had problems with them in the past (knock on wood) so worth a shot!
Base rock for one
. All I'm saying is there is nothing special about the filtration capacity of live rock. The same effects could be had with other techniques. A great example would be the supposed nitrate reducing qualities, how many tanks have we all heard about that have excessive nitrates (for the sake of the disscussion say 40ppm +) with the 1lb/gal rule of thumb? The reason being it's *rock* lol. There is only so far that the anoxic zone goes into the surface, from what I've read it's less than a few millimeters (0.0394" or just over 1/32 = 1mm) deep at best. There seems to be a mentality that the whole internal area is a zone for nitrate reduction. An exmple of something that could actually do a better job would be an Autotrophic sulphur denitrator or an ATS, or Cheto based refugium. There is also the new Zeo based systems that appear to have alot of potential (I just don't know that much about them... yet
). So far as surface area, everytime I flip through a fish magazine there are adds for scintered (sp?) ceramic "rocks", or there are things like man made Lava and Tuffa (natural is not recommended because of possible contaminants). Then there is always plain ol' everyday aragonite sand, the surface area of even an inch depth of oolitic would put a tank full of LR to shame.
I guess this type of thing has always made me wonder... Really we are talking about some of the oldest, most readily available, most adaptable bacteria on the planet. While yes we should be conscious of it's needs and yes it has importance in our tanks, I really don't think it's *as* important as what we make it out to be. I think it falls under the heading of "build it and they will come" regardless of the media
. If we ensure there are both aerobic and anoxic (and some would even argue for aenorobic) areas then the *need* for LR is only an aesthetic one. I think some are starting to get that too, there are alot of tanks being set up with nothing but baserock or artificial (concrete) or even epoxy/sand coated foam "rock", usually a mix of the three.
I would like to apologize, "drilled" might not have been the best term to use. It's just the first that popped into my head.
Chris
::: goes to fill coffee cup... Anyone want some while I'm up
:::