Hi John: Since your 125-gallon tank is acrylic, it will have twice the insulation power of glass. I would use a heater to keep it around a steady 75. I'm not using a heater in my 100 acrylic. The lights from the canopy keep it around 75-77. Another idea would be to replace the tank on the floor with the one you can put in front of the window to use the natural daylight for the plants. You could control the amount of light and heat with shades. We can lower the temp of the downstairs 72-gallon with the Leoporinus to 76. Is there anyone else that has had success with a planted tank in front of a window with a lot sun? You might be able to use some foam board, behind a background to insulate the tanks upstairs. Keep in mind that the water, heaters, and lights are helping to keep the rest of the house warm. I noticed it was very warm upstairs in the afternoon. It would be a great spot to put solar panels on the roof. Susan -----Original Message----- From: gsas-member-bounces@thekrib.com [mailto:gsas-member-bounces@thekrib.com] On Behalf Of John Ruhland Sent: Thursday, April 21, 2005 4:55 AM To: Greater Seattle Aquarium Society member chat Subject: [GSAS-Member] Room temperature tank My second-in-a-row significantly higher electricity bill arrived yesterday. I'm about to start up a new 125 gallon planted tank, and due to the timely arrival of the bill, I've decided to make it a room-temperature tank. Ecologically, I cannot justify adding another heated tank. If I get permission to keep it in the kitchen, this tank will be in a room that ranges from 65 to about 75 or 80 degrees during the year. Otherwise, it will go in a spare room, that ranges from about 55 to 75 degrees during the year. I've done this with goldfish, and my question is, are there any other aquarium fish that will tolerate this temperature range? Also, are there any plants that would or would not do well with this temperature range? I'd also like to turn down the temperature on the heaters in my other 4 tanks. I've been running them at 80, and would like to lower that as much as possible. I have one African cichlid tank, two South and Central American cichlid tanks plus Leporinus's, a community tank with scissortails, an angel, kribs, glass catfish and rainbows. Thank you, John _______________________________________________ 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