might be setting up 2 new planted aquarias anytime soon and i've found some old rock which i've bought about a year ago.
thing is. these rocks have been sitting on my balcony for quite some time. and since my balcony is also my garden i'm afraid my rocks might have been contaminated with insecticide or any undesireable substances that will harm my aquarium.
is there any way of making sure my rocks are entirely safe when putting them in? like methods of "de-toxing" them or smth.