Rocks in SEPA
I was wondering if anyone knew a good spot to pick up some "wild" rocks that will buffer PH up in a tank. I know I can get them from a few stores but I'm broke, and the only place I know of is That Pet Place in lancaster (which is an hour away from me). I'd rather scavenge if possible.
Any ideas? I live in the north west suburbs of philly area. Think Phoenixville, king of prussia, pottstown, etc...