During the summer I unplug all the heaters in the fishroom and keep the door closed. Also, I close the AC vent in that room. There seems to be no change in spawning behavoir. The tanks don't go below 76. The lights are on timers and do play a part in the temperature flucuations on the more shallow tanks like the 33 longs; 80+ during the day, 76 at night. On the larger tanks in the main room I leave the heaters plugged because of the AC and the patio door. The discus, of course keep thier sauna going year round. Francine __________________________________ Do you Yahoo!? Yahoo! Calendar - Free online calendar with sync to Outlook(TM). http://calendar.yahoo.com ----------------------------------------------------------------------- -- 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. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader