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Clean water is critical to koi health, and effective mechanical filtration is the foundation of any successful pond system. The 3 Bag Fibreglass Sand Filter is engineered to remove suspended solids and organic waste before water enters biological filtration or UV treatment stages.
Constructed from heavy-duty woven fibreglass, this filter is pressure tested well beyond standard operating requirements, ensuring dependable performance under continuous use. The reinforced tank design resists deformation and environmental stress, making it suitable for long-term outdoor installation.
The top-access lid allows quick inspection and straightforward backwashing, reducing maintenance time while maintaining consistent filtration efficiency. As a mechanical pre-filter, it protects biofilters from clogging, improves overall system flow, and helps maintain stable water quality.
Ideal for koi ponds up to 30,000 litres, this 3 bag model is a proven first-stage filtration solution for serious koi keepers planning reliable, scalable water treatment systems.
What role does a sand filter play in a koi pond system?
A sand filter removes suspended solids such as fish waste, uneaten food, and organic debris before water reaches biological filters and UV clarifiers, improving water clarity and system efficiency.
Is this sand filter suitable for koi ponds only?
This filter is specifically designed for koi pond systems where higher waste loads require robust mechanical pre-filtration.
How often does the sand need cleaning?
Cleaning frequency depends on stocking levels and feeding, but regular backwashing is recommended to maintain optimal flow and filtration efficiency.
Can this filter be installed with an existing pond system?
Yes. It is ideal for upgrading existing systems and is installed upstream of biofilters and UV units.
Why is fibreglass used for the tank?
Fibreglass provides strength, durability, and resistance to pressure and environmental stress, making it suitable for long-term pond use.
Suitable for koi ponds up to 30,000 L
Mechanical pre-filtration for solid waste removal
Reinforced woven fibreglass tank
Pressure tested beyond 26,750 cycles
Top-mounted access lid for easy maintenance
Protects biological filters from debris buildup
Compatible with UV clarifiers and biofilters
Designed for koi-specific pond systems
Uses 120 kg filter sand
5-Year Warranty
Filter Type: Mechanical sand filter
Application: Koi ponds
Maximum Pond Size: 30,000 L
Sand Capacity: 120 kg
Tank Material: Reinforced woven fibreglass
Access: Top-mounted lid
Installation Position: Pre-biofilter / pre-UV
Warranty: 5 years
