Enhance the maintenance of your aquarium with this Universal Fish Tank Water Filler, designed for both freshwater and seawater tanks. Utilizing a clever differential pressure principle, this water filler allows for easy placement and efficient water replenishment, making it especially suitable for small fish tanks. Crafted from high-quality ABS and MVQ materials, it ensures safety, eco-friendliness, and long-lasting durability for your aquatic environment. Key Features: · Universal Compatibility: Suitable for both freshwater and seawater fish tanks, providing versatile use across various aquarium types. · Innovative Differential Pressure Design: Facilitates easy and precise water replenishment, maintaining optimal water levels with minimal effort. · Secure Slot-Type Fixing: Features a center force structure that stabilizes the center of gravity, ensuring a firm and safe attachment to the fish tank wall. · Noise Reduction Structure: Engineered to minimize operational noise, offering a quiet and peaceful environment for your aquatic life. · Easy Installation and Use: Designed as an essential fish tank accessory, it is simple to install and operate without hassle. · Durable and Eco-Friendly Materials: Made from premium ABS and MVQ, providing stability, safety, and environmental friendliness for prolonged use. Specifications: · Item Type: Fish Tank Water Filler · Material: ABS + MVQ · Purpose: Water replenishment for freshwater and seawater fish tanks · Fish Tank Wall Insert Boards Included:  - 1 x 3-4mm insert board  - 1 x 5-6mm insert board  - 1 x 8mm insert board Package Includes: · 1 x Fish Tank Water Filler · 3 x Fish Tank Wall Insert Boards (3-4mm, 5-6mm, 8mm) This Fish Tank Water Filler is an indispensable accessory for aquarium enthusiasts seeking a safe, efficient, and quiet solution to maintain water levels. Its stable fixing mechanism and eco-friendly materials ensure reliability and peace of mind for your aquatic setup.