I am planning in the next week or so to set up a new tank but with sand instead of gravel as the substrate. Will this be alright for my 'muppets' the Bolivian rams re: spawning on flat rock and then digging pits for the wrigglers? G. Kadar ------------------------------------------------------------------------- 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"!