Interesting...I would need to upgrade my filter. Revolutionary Heater Design External aquarium heater installs on your return hose from your canister filter or wet/dry sump. This gets the heater out of your aquarium allowing for a more natural aquascape. Patented heating element made with the exclusive PTC system. The traditional metal resistor coils have been replaced by a special polymer sheet, silk-screened with heating ink. Setting of temperature controlled by an electronic circuit with indicator light. Completely safe. No danger of damage if the equipment is left running without water for a short period of time. Connectors suitable for flexible pipe of external filters. ________________________________________________________ Shango Los Phone: 206-595-9006 Fax: 206-729-5271 www.ShangoLos.com www.SunbreakShines.com -----Original Message----- From: gsas-member-bounces@thekrib.com [mailto:gsas-member-bounces@thekrib.com] On Behalf Of Shango Los Sent: Monday, January 21, 2008 10:21 AM To: 'Greater Seattle Aquarium Society member chat' Subject: Re: [GSAS-Member] Is it hot in here? - Aquarium Thermometers What does an "In Line Heater" do? _______________________________________________ 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