Dry Rock Suppliers

[Reefer Rob]

Originally Posted by FitoPharmer

That is not 100% true. Rock that is too porous can be also problematic. Dense rock has the anoxic areas that harbor the bacteria that convert no3 into nitrogen gas.

I mean the structure of the rock itself, not that it necessarily has more passageways etc... though this is important as well IMO. Water needs to be able to penetrate the rock in order for it to function well.