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Close-up of several black KW Zone bio balls showing the open lattice structure.
A pile of KW Zone black bio ball filter media.
Large quantity of KW Zone bio balls with a single ball and a planted aquarium shown alongside.
Before and after comparison showing aquarium water clarity improved by bio ball filtration.

Bio balls are the biological stage of a filter. Their job is to hold as much surface area as possible in a small space, giving the beneficial bacteria that convert ammonia and nitrite somewhere to colonise. This pack of 30 suits aquarium and pond filters alike.

Key Features

  • High surface area per ball for bacterial colonisation.
  • Supports the biological breakdown of fish waste, ammonia and nitrite.
  • Made from durable, non-toxic material that will not degrade in water.
  • Reusable, and suitable for both aquarium and pond filters.
  • Pack of 30 pieces.

How to Use

Place in the biological chamber of your filter, after the mechanical stage so debris is caught before it reaches them. When cleaning, rinse only in old tank water, never under the tap. Chlorine in tap water kills the bacterial colony, which is the whole reason the bio balls are there in the first place. Stagger cleaning across the media if you can, rather than doing all of it at once.

Kw zone bio balls filter media

Biological Media | Aquariums & Ponds | High Surface Area | 30 Pieces

AED 31.50

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S-30MMS-30MM
M-38MMM-38MM

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Bio balls are the biological stage of a filter. Their job is to hold as much surface area as possible in a small space, giving the beneficial bacteria that convert ammonia and nitrite somewhere to colonise. This pack of 30 suits aquarium and pond filters alike.

Key Features

  • High surface area per ball for bacterial colonisation.
  • Supports the biological breakdown of fish waste, ammonia and nitrite.
  • Made from durable, non-toxic material that will not degrade in water.
  • Reusable, and suitable for both aquarium and pond filters.
  • Pack of 30 pieces.

How to Use

Place in the biological chamber of your filter, after the mechanical stage so debris is caught before it reaches them. When cleaning, rinse only in old tank water, never under the tap. Chlorine in tap water kills the bacterial colony, which is the whole reason the bio balls are there in the first place. Stagger cleaning across the media if you can, rather than doing all of it at once.