Dr Tim's One & Only Freshwater

3 reviews

Use Dr Tim's One & Only live nitrifying bacteria to eliminate new tank syndrome and treat nitrite and ammonia levels in your freshwater aquarium.


  • One & Only Freshwater 60ml/2oz
    code: 220000 In Stock (Only 7 left!)
  • One & Only Freshwater 120ml/4oz
    code: 220001 In Stock (Only 4 left!)
  • One & Only Freshwater 240ml/8oz
    code: 220002 Out of stock (
    More stock due in 2 days

Product Information

Use Dr Tim's One & Only when setting up a new tank, after a water change, cleaning your filter, when adding new fish and after a disease treatment to control ammonia and nitrite.

The key to setting up a successful aquarium is to quickly convert fish waste into a non-toxic form. This is done by nitrifying bacteria. Under normal conditions it can take 30 to 45 days for this bacteria to become naturally established in a newly set-up aquarium. Unfortunately, during this time period, ammonia and nitrite can increase to levels toxic to fish - a process called New Tank Syndrome. For years, it was assumed that two particular species of nitrifying bacteria were responsible for this process but original scientific research by Dr. Timothy Hovanec showed this not to be the case. This is one reason why nitrification products have failed to work in the past.

120ml (4oz) treats 227ltrs (60gal).

240ml (8oz) treats 454ltrs (120gal).

Key Features:

  • Eliminates new tank syndrome.
  • Instantly creates a bio filter.
  • Removes toxic ammonia and nitrite, naturally.
  • No sulphur or other offensive odours.
  • No wait needed.
  • 100% natural.

If you are looking for Marine One & Only click here.

Latest Customer Reviews

  • Rating
    Date 24/01/2021 08:01am
    Dr Tim's One & Only Freshwater 240ml/8oz
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    Has not been delivered yet
  • Rating
    Date 05/11/2020 18:11pm
    Vitalis Rift Lake Green Cichlid Flake 90g
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    Excellent prices accompanied by excellent service. Thank you!
  • Rating
    Date 15/08/2020 09:08am
    Dr Tim's One & Only Freshwater 240ml/8oz
    Feefo Logo
    Took a few more days to work than expected.