🔥 Keep Your Fish Cozy and Happy! Toughened safety glass ensures durability against even the most curious fish. On/off indicator light for easy monitoring of heater operation. Perfectly sized for shallow tanks, maximizing space without compromising performance. Experience high-precision temperature control for optimal aquatic life. Install vertically or horizontally to suit your aquarium layout. 25w Power Fully Submersible Adjustable Temp The Hidom 25w Submersible Aquarium Heater HT-2025 is designed for tanks up to 30 liters, featuring a high-precision temperature control system, toughened safety glass, and a compact design for versatile placement. Ideal for both tropical and marine fish, this heater ensures a stable and safe environment for your aquatic pets.