Dr Tim's One & Only Marine

5 reviews

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


  • One & Only Marine 60ml/2oz
    code: 1VDR002 In Stock (Only 2 left!)
  • One & Only Marine 120ml/4oz
    code: 220024 In Stock (Only 2 left!)
  • One & Only Marine 240ml/8oz
    code: 220025 In Stock (Only 5 left!)
  • One & Only Marine 475ml/16oz
    code: 1VDR016 In Stock (Only 1 left!)

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.

60ml (2oz) treats 114ltrs (30gal).

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

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

475ml (16oz) treats 909ltrs (240gal).

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.
  • Can be used with Dr Tim's Ammonium Chloride Solution.

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

Latest Customer Reviews

  • Rating
    Date 13/02/2021 16:02pm
    Dr Tim's One & Only Marine 60ml/2oz
    Feefo Logo
    Dr Tims One and Only purchased with Ammonium Chloride worked out great for me.

    The Nitrobacter bacteria went to work right from day 1! There were absolutely no detectable reading for Nitrite throughout out the entire 14 day cycle. And the Nitrosomonas bacteria were removing Ammonia, but had to build up to where they could remove 3ppm of Ammonia in 24 hours.

    Overall great product, would recommend and use again, it's not "snake oil" as some would say!
  • Rating
    Date 28/12/2020 05:12am
    Dr Tim's One & Only Marine 240ml/8oz
    Feefo Logo
    Does what it says on the bottle great product to help getting your new marine tank up to speed with lots of good bacteria
  • Rating
    Date 12/11/2020 13:11pm
    Dr Tim's One & Only Marine 240ml/8oz
    Feefo Logo
    Have used this product before and found it useful for speeding up the cycling process.
  • Rating
    Date 25/08/2020 06:08am
    Dr Tim's One & Only Marine 120ml/4oz
    Feefo Logo
    It actually works and was very easy to use after 4days the tank has nearly cycled
  • Rating
    Date 07/05/2020 06:05am
    Dr Tim's One & Only Marine 240ml/8oz
    Feefo Logo
    Excellent product if you know what you are doing