ichthyoid;720400 wrote: Hate to disagree, but Teflon and silicone are inert polymers. Teflon is used as a non-stick coating in cooking pans. Silicone is used to glue our tanks together. (maybe you mean silicon, no 'e'?) Graphite is carbon (unactivated) which I've been walking around with a chunk in my hand since 8th grade. Lead is toxic, yes. Personally, I suspect something else. What would kill fish and not inverts? -JMHO
Silicon Teflon graphite lead are toxic to ingest and salt water fish have to drink in water to stay hydrated I was just throwing that out there as possible causes of fish death from coatings that are used in mouse pads to lower friction
(Wen Teflon coating in pans gits scratched you are supper to git rid of them also the reason restraints don't use them)