King British Filter Aid + (Safe Water) 100ml-250ml

7 reviews

Adding King British Filter Aid + (formerly Safe Water) to your aquarium can help remove the dangerous levels of ammonia that have built up in your tank, causing problems for your fish and contributing to algae growth.


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Product Information

Neutralise the ammonia in your fish tank quickly and safely with this great treatment from King British. Filter Aid introduces a large amount of beneficial bacteria which kick starts the 'cycling' process and matures the filtration process.

King British Safe Water will help you turn the aquarium water into a safe, healthy and crystal clear habitat for both cold water and tropical fish.


  • Partial water changes.
  • Introducing new fish.
  • Setting up a new aquarium.
  • Boost the filtration system.

Dosage: Carefully calculate the volume to be treated making adequate allowance for the displacement of water by gravel, rocks and equipment. Invert bottle gently to mix before use. Add 1 capful (4ml) of Filter Aid+ for every 36 litres (8 gallons) of water. When starting a new aquarium or when using in a marine aquarium, use a double dose. Repeat treatment once a week, after carrying out water changes, after using fish medicines, and when adding new fish.

Latest Customer Reviews

  • Rating
    Date 10/08/2020 04:08am
    King British Filter Aid 250ml
    Feefo Logo
    We use these in our fish and turtle tanks
  • Rating
    Date 19/04/2020 09:04am
    King British Filter Aid 100ml
    Feefo Logo
    Quality product essential for filter efficiency and fish health
  • Rating
    Date 26/03/2019 07:03am
    King British Filter Aid 250ml
    Feefo Logo
    Very good price and service
  • Rating
    Date 17/03/2017 08:03am
    King British Filter Aid 250ml
    Feefo Logo
    Good quality product does what it says on the tin
  • Rating
    Date 04/11/2016 10:11am
    King British Safe Water 250ml
    Feefo Logo
  • Rating
    Date 12/11/2015 04:11am
    King British Safe Water 100ml
    Feefo Logo
  • Rating
    Date 28/04/2015 17:04pm
    Interpet PF1 Internal Power Filter
    Feefo Logo
    seems good - will depend on how long it lasts