Is it the calcium that supposedly help the shrimp or am I just using the cuttlefish to raise my water hardness and THAT is what helps the shrimp? -----Original Message----- From: gsas-member-bounces@thekrib.com [mailto:gsas-member-bounces@thekrib.com] On Behalf Of naturalart Sent: Sunday, October 07, 2007 4:53 PM To: gsas-member@thekrib.com Subject: [GSAS-Member] cuttlebone or not Cuttlebone is not really bone but rather shell. cuttlebone come from squid which are 'directly' related to a relict group of animals called ammonites. The nautilus is one of the two remaining living species in this group. Maybe someone can explain the chemistry on this but squid die by the thousands regularly in the ocean. You are talking about freshwater shrimp, so obviously it will harden your water, but it shouldn't be toxic. Personnally I think there are better ways to raise your hardness or alkalinity. Clay A. _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member