I've got an off topic question. Hope this is okay. I've got four tanks of varying sizes with apistos and other fish in them. All are heavily planted. In two of them, however, I can not seem to keep algae eating shrimp from dieing quickly. In the other two the shrimp (and snails) do fine, and keep algae under control. The only difference in the two tanks (one of which contains a pair of A.steindachner which I think may have just bred... no fry yet, but she is showing signs) is that I have fluourite in the substrate. Anyone have experience that might shed some light in this? Does it contain some compound that would be toxic to inverts? Sorry this is off topic. -- Daniel Gottsegen <dgotts@earthlink.net> ------------------------------------------------------------------------- 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. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!