when im not at home gazing at my fish tanks, i work as a bike messenger, and after the thread about black sand, i noticed something... lots of the ashtrays outside buildings are filled with, yes, you guessed it, black sand... so, being a curious fellow, i ah... "procured" some of said sand, cleaned it (*lots*), and put it in a tank with some cardinals. it basically looks exactly the same as the black sand available in several aquarium stores around san francisco... and nothing has died in the tank that has it in it, and no weird pH or other changes... so, today i went looking for said sand, and found it. should be available at your local janitorial supply store (here in sf, i found it at easterday on 7th st between folson and harrison). the counter guy there said it was either silica sand or coal slag (which i remember someone on the list mentioning during the discussion). the price? $21.40 for a 100 lb bag. a veritable entertainment value. now to figure out how to get 100 lbs of sand home on my bike, and where to store it... -joel ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!