Microbial Dipslides

Testing Fuel for Infection

fuel bugStored 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.

The Solution

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

A simple dip slide test can give results within 1 – 5 days, allowing you to treat the contamination appropriately before it takes over.





 Quick, Simple and cost effective testing.

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

Find out more about types of fuel contaminates.

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. Available to buy in units of 1 or in a pack of 10.

Treating an infection

We highly recommend treating any bacterial infection as early as possible with WASP® BIOKEM SP15 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 filtering system should be used. More Detailed Testing 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. Preventative measures With the introduction of BioDiesel, the risk of contamination from bacteria is even higher. Bio-fuel is hygroscopic and attracts water, the cause of all microbial growth. We recommend regularly treating your fuel with WASP® BIOKEM SP15 as a preventative measure to avoid microbial growth. For more information on WASP® BIOKEM SP15 and to buy online, click here.

Dip slide UK pricing for Fuel Bug Dip Slide Tests

Please note, at this time we can only sell to UK mainland.

Need help selecting a filter?

See our guide to help you select the most suitable filter for your needs.

Technical Support

How it works

See how the Separ filter works to separate water and particulate from fuel. 

SWK2000 flow diagram transparancy

How to Order

Call or email us to place your order. We accept ALL major credit and debit cards, bank transfer and also PayPal. 

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Expert advice

Unsure which spare parts you require? Or if a Separ filter will meet your requirements? 

Talk to our expert team. Call 01923 276 007



Delivery options

We have a wide range of shipping options available to suit your destination and budget.



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Contact Us

3 Kingley Park, Station Road, Kings Langley, Herts, WD4 8GW

Tel: +44 (0)1923 276007

Fax: +44 (0)1923 267463

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Here to Help

Product guides

Fuel Specs


Selecting a Filter