Bacteria balls for long-lasting biological filter activation

Bacto Start Filter Balls



  • Highly effective mixture of selected, living filter bacteria for all garden ponds, especially Koi ponds
  • Increases filter capacity
  • Supports the biological balance
  • For healthier water thanks to fewer harmful substances
  • Guards against fish loss
  • Also ideal for swimming ponds
  • Breaks down fish excrement, food residues and dead plant matter
  • Breaks down proteins, fats, carbohydrates and many harmful organic substances
  • Removes harmful substances
  • Promotes the rapid breakdown of ammonium and nitrite
  • Increases the self-cleaning power
  • Promotes sludge degradation
  • Shortens the establishing period of new ponds and makes them more stable
  • Introduces the "right" bacteria to the pond filter from the start


The bacteria convert nitrate into gaseous nitrogen and as a result reduce the nitrate content.

Excellent bio-compatibility for fish, plants and all other pond inhabitants.

Perfectly harmless for people, animals and the environment. Pond water treated with BactoStart FilterBalls is harmless to all pets (dogs, cats) and birds.

The filter bacteria are instantly active on contact with the pond water. They gradually come out of the gel balls, reproduce and colonise the entire filter material.

3577250 ml10,000 L
  • Dosage/application

    Spread the BactoStart FilterBalls evenly over the filter material or place onto the filter material in a suitable net bag. Add the remaining liquid to the filter. Disconnect UV-C water clarifier for 3-4 days.

    For best results, replenish every 3 months.



    • When using the filter for the first time
    • After every filter clean
    • When using new filter material
    • After medicinal treatment
    • When ammonia or nitrite levels are high
    • To increase the self-cleaning power
    • Where the fish population is large
    • When introducing new fish
    • When there are problems with water quality
    • When there is a sludge build-up