Great post, Roger. Now, dosing iron daily just isn't going to happen for me - feeding the fish daily is pushing it. So, what do you recommend for a substrate-iron-enricher? Rachel ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe aga-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/aga-member/