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Dipslide testing for bacterial infection in fuel

Stored fuel is at risk of infection such as bacteria, which can quickly multiple and if left untreated, can lead to failure of backup systems which could be disastrous in an emergency situation.

Water can form in any fuel tank, typically from condensation, poor ventilation or water ingress (especially common in marine vessels).  Water, while a contamination itself, is the main cause of formation of all other forms of contaminations, such as bacteria, yeast and moulds. Infections then quickly multiply and can lead to blocked fuel filters, damaged injectors, engine failure and can be potentially life threatening if back up power supplies fail.

We therefore recommend fuel is checked regularly for signs of contamination so any infection can be treated early on.

To prevent and/ or treat infection, we recommend our popular additive, FTR.



Diesel, Petrol, Heating Oil, MDO, Kerosene


Immerse in fuel and leave for several days for results.


Discover a contamination early before it is untreatable.


We can supply effective treatment and advice if infection is present.

  • Easy to use
  • results within 1 – 5 days
  • test for bacteria, yeast and moulds
  • available in packs of 1 or 10
  • suitable for diesel, petrol, kerosene, heating oil or MDO.

The dip slide is held within a container which keeps the agar clean before and during processing. An instruction sheet and a growth chart are also included.For most accurate results, we recommend using an incubator to keep the sample at a consistent temperature of between 30 and 35 Degrees Centigrade.

The Micro Dip Slides are easy to use and test for bacteria, yeast and moulds. Suitable for:

  • Diesel
  • petrol
  • Kerosene
  • Heating Oil
  • MDO

We highly recommend treating any bacterial infection as early as possible with FTR to prevent further spreading of the bacteria.

WASP® BIOKEM SP15 can be used to prevent further spreading of bacteria even with very heavy growth, but please note, it will not remove the residue already there.

To remove existing residue, a fuel cleaning system should be used.


If you would like professional and detailed fuel testing, please contact us to discuss having fuel samples taken and sent to our lab for analysis.

We also recommend you follow our Good Fuel House Keeping Guide as well as treating fuel regularly with a preventative dose of FTR.

NOW AVAILABLE  WASP PFS Incubator to incubate your dipslides after testing at the ideal temperature.   Contact WASP PFS for more details.




Product Range Gallery Guide to Fuel Polishing Detailed Fuel Analysis