Gregory Day
Member
I’m struggling to find rocks big enough for my scape and not willing to pay 3.45 a kilo been offered these for nothing is it ok
Yes, should be OK. I'm pretty sure it is <"Carboniferous age limestone">.offered these for nothing is it ok
I'd be surprised if the rocks weren't fine, but I agree with @sparkyweasel that the <"Daphnia bioassay"> is a good idea.Also the Daphnia test to check if they release anything toxic