Biological filter - Pond less than 75m³ (without fish) and less than 25m³ with fish (20 adult koi)

Pressure bacterial filter for 25 m³/h.

The Shark Bead is a pressure filter that provides mechanical and biological treatment for ornamental or swimming pond water. It contains a substrate made of floating plastic beads, whose specific shape promotes bacterial overgrowth. The "good" bacteria colonize these beads to form a biofilm. This bacterial growth prevents even the finest waste particles from passing through these filter media (mechanical filtration) and converts toxic waste into harmless elements (biological filtration).

Water enters the tank through a pump. It then passes through the bacteria-colonized beads, crosses the screens, progresses to the multiport valve, and returns to the pond. The high-flow booster, equipped with a check valve, is useful during filter cleaning. A pre-filter sieve is highly recommended upstream of the filtration.

How does mechanical filtration work ?

Settling allows the removal of larger suspended particles (>50μ). The finer particles (>20μ) are retained within the beads due to the network created by the bacterial biofilm. This is known as bio-absorption. This microscopic-scale network captures the majority of waste, even those invisible to the naked eye.

How does biological purification occur ?

Bacteria that develop on the surface of the beads form a biofilm that converts toxic nitrogenous waste (ammonia, nitrite) into nitrates. When mature, this biofilm becomes a compact "magma." Biological purification is then optimal, and denitrification, necessary for algae control, can take place.