Why You’ll Love It The hygger Crystal Aquarium Filter is a high-efficiency, hang-on-back filtration system engineered for crystal-clear, oxygen-rich water. With its innovative bottom-mounted pump, multi-stage filtration, and ultra-quiet operation, this filter delivers full-contact purification for 4–50-gallon fish tanks. Key Features Multi-Stage Filtration System Designed to maintain optimal water quality, the HG099 filter processes aquarium water through three distinct media types: Ceramic Balls: Encourage colonization of nitrifying bacteria, vital for biological filtration. Biochemical Cotton: Captures fine debris and uneaten food, keeping clear water. Activated Carbon Cotton: Absorbs odors, discoloration, and chemical impurities for a polished finish. Together, they create an efficient and balanced purification cycle that supports a stable nitrogen process. Innovative Cleaning Mechanism The large internal chamber accommodates a variety of filter media, giving aquarists the flexibility to design their own filtration system. Replacement and cleaning are straightforward — simply lift the media trays, rinse with tank water, and reassemble in minutes. Ultra-Quiet Silent Operation Filter Using a bottom-mounted water pump and anti-vibration pad, the filter runs whisper-quiet — quieter than 35 decibels, about the sound of rustling leaves. The overflowing waterfall outlet gently disperses water, reducing splashing noise while enhancing oxygen exchange. Perfect for bedrooms, offices, or living rooms. Adjustable Flow Design A built-in flow adjustment knob on top allows you to precisely control the water volume to match tank conditions. Lower the flow for small fish or shrimp tanks; increase it for community aquariums or tanks with higher waste output. Instant Startup — No Priming Required The integrated bottom pump eliminates the need for manual water filling before use. Once plugged in and submerged, the filter self-primes, simplifying maintenance and ensuring effortless operation. Compact, Modern Design Crafted for convenience, this hang-on-back design saves space while offering high filtration capacity. The transparent lid provides easy visibility, while the fixed stabilizing pad keeps the unit vertical and reduces vibration against the tank wall. The hygger 099 crystal filters come in two sizes: The 79 GPH S model is ideal for aquariums ranging from 4 to 21 gallons. The 153 GPH L model is suitable for larger setups from 20 to 50 gallons. Usage Tips Ensure the intake sponge is fully submerged before switching on the filter. Adjust the flow knob to suit your fish type and tank conditions. Clean the biochemical and carbon cotton pads regularly with aquarium water to maintain peak filtration efficiency. Replace the activated carbon pad monthly to ensure continuous chemical filtration. Keep the water level consistent to allow the waterfall outlet to function quietly and efficiently. Specification Package: 1 x Fish tank filter 1 x Air inlet pipe 1 x Extension pipe 1 x Air inlet sponge 1 x ultra-fine cotton/activated carbon cotton/bio-ball People Also Buy 20% OFF hygger Accurate Quartz Glass Aquarium Heater 200-500W prevent overheat for 10-135 Gal $31.18 – $34.99Price range: $31.18 through $34.99 Rated 4.83 out of 5 35% OFF hygger Fish Waste Collector For tanks larger than 20 gallons $29.99 – $41.99Price range: $29.99 through $41.99 Rated 4.63 out of 5 Sold out hygger Flow One Aquarium Wave Maker 18/25W intelligent mode for 55-120Gal $51.19 – $59.19Price range: $51.19 through $59.19 Rated 4.60 out of 5 hygger Planted Full Spectrum Aquarium Light 10-48W has clamp brackets for 7"-52" tanks10% OFF $30.99 – $66.99Price range: $30.99 through $66.99 Rated 4.86 out of 5
