hi, Thank you for the response about my lighting and gorgonian question. In the past I had bought some porous rock from the local fish store to supplement the live rock, and it’s done very well and is covered with polyps and coralline algae. I recently bought some more rock – but got a porous red lava rock without realizing it wasn’t what I had bought originally. Before I introduce it into the tank, I was hoping to get an opinion if this is ok or a mistake! This is a 30 gallon reef tank w/ lots of polyps, soft corals, clownfish, pajama cardinals, etc. Thanks, Ben <... Have seen/experienced red lava rock that was both fine for marine aquarium use AND other types that were disastrous chemically, physically... I would at the very least "do a bio-assay" with boiling a bit of water with some of this rock in it, letting it cool, and subjecting some fish and non-fish life to its presence for a few weeks before placing it in my/your main/display tank... You can get/use
