Kathy, I'm not talking that there is a direct injury due to the UV sterilizer, in fact they do fish good.. but what happens is that the immune system no longer has to deal with cases of Ick, and other parasites, bacteria etc.. because they're eliminated, and eventually what will happen is that the immune system has shrunk so much that the new generations of fry are more likely to get ill, if they're introduced to other tanks not on the UV... I know this because there are several pet stores in my area have these (not on salt water, but on fresh too) and the fresh are very weak and die off easily... Does this make sense, correct me if I'm wrong.. this is just MHO. Chris ------------------------------------------------------------------------- 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"!