can anyone advise if firebricks are safe for fish ponds? i made a pond with
a one foot deep plant shelf, but my plants need to be up a little higher in
the water. i put the flower pots on old firebricks i had laying around the
yard. i waws wondering if they are made of anything that would leech out and
harm the fish. Any thoughts on this?

Tony

sorry if this is a duplicate post, am having trouble posting today...