SG

The KW Zone Astro AS Internal Filter is a series of compact, fully submersible filters for aquariums, designed for both freshwater and saltwater tanks, offering reliable, quiet filtration with sponge media, suction cups for mounting, and optional aeration via an air tube, coming in models like AS-300F, AS-500F, and AS-1000F with varying flow rates (e.g., 227L/H to 1080L/H) to keep water clear and support fish health.  Key Features:

• Internal Filtration: Placed inside the aquarium, it draws water through slits.
• Filtration Media: Uses a sponge to trap debris and a carbon cartridge for polishing.
• Aeration: Can connect an air tube to create bubbles, enhancing oxygenation (tube stays outside water).
• Easy Installation: Comes with suction cups for secure attachment to glass.
• Silent Operation: Engineered for quiet performance.
• Versatile: Suitable for fresh and saltwater. 

Models & Output (Examples):

• AS-300F: Max output ~227 L/H (liters per hour).
• AS-500F: Max output ~500 L/H.
• AS-1000F: Max output ~1080 L/H. 

How it Works (General Internal Filter):

1. Water enters the filter intake.
2. It passes through the filter sponge, trapping waste.
3. Water is then pumped back into the tank, often through an adjustable nozzle.
4. An optional air tube mixes air, creating bubbles for extra aeration.