Random thoughts... no science. Did a google search for sassafras and toxins and got some stuff which primarily applied to substances found in bark and roots... there is a carcinogen there, and the FDA has banned bark/root extracts as a flavoring. Obviously, your extract is not immediately toxic; long-term, I'm not gonna guess. Boiling bothers me sort of... one doesn't know what might be extracted which would not by simply steeping; boiling may change the chemistry of something which is fine not heated (technically, I guess the opposite is equally true... but creeks seldom boil). I wonder if the best and most natural strategy (if you're gonna play junior aquario-botonist) is to not use a single source of leaves... all plants have compounds designed to protect themselves, and if you use a few of many species of leaves (each of which you can reasonably expect to be fairly non-toxic) you might avoid over-concentrating any one toxin. That, or rotating which leaves are used... Peat and oak leaves have been used for so long and so successfully to add organic compounds to aquaria that I wonder why one would need to use anything else. It would take years and generations to demonstrate that something was probably safe, and a laboratory to prove it... Martha Apist-O-Rama wrote: > Austin is in eastern TX. Lets assume that I just boiled some sassafras > leaves. Anyone see any problems using them in my apisto tanks? > > Eric > ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader