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Wessex Blue Bio 500ml toilet fluid is a new generation, multi-purpose, blue toilet fluid primarily for cassette waste tanks and flush tanks in caravans, motorhomes and portable camping toilets and marine and boat applications.

Blue Bio toilet fluid is also suitable for use in septic tanks, boat holding tanks and grey water tanks where the blue dye isnt an issue.

Blue Bio is a very green toilet fluid, but blue in colour.

A toilet fluid that was is environmentally friendly as possible without compromising on performance.

We found a way to increase the amount of waste and odour consuming natural bacteria.

With a small dilution rate and were hoping its an offer you cant refuse.


Available in 3 Sizes

Wessex Chemical Blue Bio 500ml Dispencer Bottle

Wessex Chemicals Blue Bio 3.25 Litre

Wessex Chemicals Blue Bio 5 Litre Trade Size


Multi-purpose so you can use it in the waste and flush tank, holding tank, grey water tank and septic tank avoiding the need to buy multiple, seperate products.

Saving money and takes less space in the storage cupboard.

Blue Bio toilet fluid cleans the flush tank, keeping it mould and limescale free.

Its been made with a blue food grade dye because it hides waste better than green or purple and its washable so it doesnt stain clothing and carpets permanently.

Also smells nice too.

We put Blue Bio toilet fluid into a handy dosing bottle, so you can dose your tanks accurately, with less fuss and mess.

This means you will get loads of doses out of the 500ml bottle.


Blue Bio toilet fluid works with mother nature to breakdown waste whether its in your caravan, motorhome, boat or in the sewage plant.

Blue Bio toilet fluid is formaldehyde glutaraldehyde and biocide free unlike many harmful substances contained in many toilet fluids

Works with natural bacteria to breakdown sewage this greatly reduces its impact on the environment and brings disposal costs down associated with chemical disposal.

Its non-hazardous and 100% biodegradable, making it the friendly chemical toilet fluid that works.


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