Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low View: 12 24 All Quick View Quick View Chillers & HeatersHydor Theo Heater for 26-53 Gallons – 200 Watt $38.10 Hydor Theo Heater for 26-53 Gallons - 200 Watt Quick View Quick View Chillers & HeatersHydor Theo Heater for 53-80 Gallons – 300 Watt $44.10 Hydor Theo Heater for 53-80 Gallons – 300 Watt