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HD-602 ADJUSTABLE FLOW CONTROL: Powered by an energy-saving 2.5W motor with an integrated dial to easily alter bubble intensity. Delivers up to 2.0 Litres Per Minute (LPM) via a single outlet for tanks ranging from 50 up to 300 Litres. WHISPER-QUIET 35dB OPERATION: While top-selling competitors hum along at a noisy 40dB, the HD Series operates at an ultra-low 35 decibels—making it noticeably quieter than the market average. Engineered with a thick, sound-insulating shell and vibration-dampening rubber feet, it eliminates annoying cabinet rattle to deliver powerful, near-silent aeration you’ll barely notice. COMPLETE ALL-IN-ONE ACCESSORY KIT: Every pump comes fully loaded with a complete installation kit, containing premium porous air stones for dense bubble generation, standard flexible airline tubing, and a non-return check safety valve. VERSATILE SYSTEM OXYGENATION: Engineered with deep-water pushing power so the air flow won't fizzle out at the bottom of your tank. It provides plenty of steady punch to easily run sponge filters, under-gravel filtration grids, long air curtains, decorative ornaments, and oxygen-rich bubble walls across freshwater, tropical, and marine setups. ANTI-SIPHON SAFETY PROTECTION: Non-submersible design engineered to run external to the tank. The included inline non-return check valves provide total protection, preventing gravity from siphoning tank water backwards down the line into electrical components during power cuts.