Originally Posted by 1journeyman
Nope, I trust ya.
How can you tell the difference between man made and real lava rock?
Actually that is an excellent question. I am not for sure on that, but I would think that true lava rock wouldn't be the cheaspest thing in the world since its harvested & is only formed by volcanoes.
I've been told that pretty much all the stuff for like landscaping & flower beds at places like Home Depot, Lowes, etc. is man-made. As well as of course the kind sold in pet stores. A lot of people use the lava rock chunks for flower beds in their pond filters & also some in wet/dry aqaurium filters.