Rock Safe? Need opinions, should I use these rocks in my 10GL

[Mantis_22]

yeah, theres always luck and plain old trial and error..

 

[somefinnfishy]

I'm allways woried about what was sprayed on a rock at some point in time ferts,insecticides,herbicides,fungacides.most of these would soak into most rocks beyond the point of a simple boiling makeing them safe.
I run most of my new rocks in the dishwasher loaded with vinegar.Dont know if it helps but they sure are clean