Mike wrote: >>>It looks like my professional degree from the Colorado School of Mines in Hazardous Materials Management might be useful after all. <<< Mike, some web sites mention special disposal requirements for broken thermometers and thermostats, both containing elemental mercury. Should special disposal consideration be taken with the water and/or the gravel in this situation? Bill Vannerson ------------------------------------------------------------------------- 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://www.digital.com for "Apistogramma Mailing List Archives"!