HITOP calentador de acuario ajustable con cubierta protectora, 25 W, 30 W, 50 W, 100 W, 120 W, calentador de tanque de peces y tortugas para 3 galones a 35 galones de agua dulce y termostato de agua de marSafe: We adopt 2mm thickened explosion proof glass, 33% thicker than normal aquarium heaters, more durable, much safer for both human and animals. Double Protection: There is a protective cover wrapping the heater tube, triangle streamlined design, full of modernity, not only double safety, but also space saving and beautiful in your aquarium. Easy to Set Temperature: After set the temp you want, due to the automatic switch device and temperature