Dominic, I've sometimes had to put dark construction paper between tanks to keep males from staring themselves silly. They never did breed until they couldn't see each other, although I hadn't put two and two together. They'd ignore the females and just spend days trying to figure out how to melt glass. I've had good success having males join in guarding their fry in unobstructed view side by side tanks, once I removed the visual barrier. Macmasteri seemed really prone to getting into these contests. It figures you'd have a veijita involved. Gary Elson (just up the road in Montreal) ------------------------------------------------------------------------- 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"!