Bio Filter 25 litre with 8 Watt UV Gravity - 40kg

UltraZap Bio Filter Gravity flow with 25 litre media
Complete with bio balls and foam set

8 Watt UV gravity flow
For 4000 litre ponds with normal fish population
Flow rate 35 litre per minute. (2,100 litre per hour)

Biological filtration happens in the chamber containing living bacteria that populate the media in the filter. Fish excretes ammonia from their gills and toxifies the pond water they live in. Bio filtration is required to break down ammonia into nitrite and nitrite into nitrate to de-toxify the pond.

Works for both Gravity Fed or Gravity Return systems.