I've gone to a sand blasting supply company. In my area (Minnesota) I can get red flint gravel in many different sizes. You can get it so small that it might be too fine for an undergravel filter. For black "sand," they have one product called "black beauty." (Someone once questioned its mineral content, but it appears to be inert. I have had black beauty in some tanks for years and with no problems.) The sand blasting supply company is where several aquarium stores (around here) get their natural-colored gravel that they use and resell. I think it cost me something like $6 or $8 per 100-pound bag for red flint. And they have other types of "gravel" available on display. Just look in the yellow pages (or on the 'Net) under "sand blasting." --Randy Brian Berggoetz wrote: > I'm looking for a darker substrate than the silica sand I have now. > Good stuff but too bright. Is there a pea gravel that is fine enough > for the apistos too still dig in it? Is there another alternative? I'd > like to keep it more natural than the bare bottom tank. I'm interested > in natural behavior. > bb > > ------------------------------------------------------------------------- > 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"! ------------------------------------------------------------------------- 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"!