How often are peat products treated with pesticides? In specific, I'm wondering about those dried and compressed peat pucks that are bound up in netting. They are used to start seedlings.
I've often wondered if they are really safe to use in aquatic systems. Of course, I could test it out myself by adding them to a jar of water and seeing if any small organisms appear, but since I haven't done that, I thought I'd ask here.