>I recently picked up some Apistogrammoides pucallpaensis and after a few >weeks of what seemed to be excellent health and vigor, they are starting to >go down. [snip] All suggestions welcomed. Since you said all suggestions here goes. Having no direct experience with them, it sounds like nematodes are a distinct possibility. If so, they are apparently difficult to impossible to eradicate. You might want to try the experts at rec.aquaria.freshwater.cichlids as I've seen the topic come up there. Good luck. - -Doug Brown debrown@kodak.com