Chris, Very interesting! I replied off-list so I could get the dirt. It's hard to know what kinds of additives will help and what's no good. I trust SeaChem, mainly probably because I know the guy who owns it, but from reading the label of the Marc Weiss stuff, it sounds great. Of course, I realize I'm saying I believe the advertising, but the label was all I had to go on. What have you been able to discover about the Marc Weiss Amazon stuff? Thanks in advance. Stuart -- Stuart Hall (sturob@swbell.net) (gasdocstu@my-deja.com) ------------------------------------------------------------------------- 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"!