Blue Bio Toilet Fluid

Blue coloured Toilet Fluid for cassette, waste & flush tanks

Finally, a truly green toilet fluid that outperforms harsh chemical alternatives…
Blue Bio toilet fluid is a new generation, multi-purpose, blue toilet fluid primarily for cassette/waste tanks and flush tanks in caravans, motorhomes, boats and portable camping toilets. Blue Bio toilet fluid is also suitable for use in septic tanks, boat holding tanks and grey water tanks (where the blue dye isn’t an issue). Blue Bio is a very green toilet fluid, but is blue in colour.
Our mission was to create a portable toilet fluid that is as environmentally friendly as possible without compromising on performance. For a start Blue Bio toilet fluid works really rather well. We found a way to increase the amount of waste and odour consuming natural bacteria in the product without making the price unsavoury. Combine that with the small dilution rate and we’re hoping it’s an offer you can’t refuse.
We made it multi-purpose so you can use it in the waste and flush tank, holding tank, grey water tank and septic tank. Therefore avoiding the need to buy multiple, seperate products. That could save you significant sums of money and takes less space in the storage cupboard. Blue Bio toilet fluid cleans the flush tank, keeping it mould and limescale free. It’s been made with a blue food grade dye because it hides waste better than green or purple (plus we think it looks nicer) and it’s washable so it doesn’t stain clothing and carpets permanently. Oh, and it 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 1 litre bottle.
Blue Bio toilet fluid works with mother nature to breakdown waste whether it’s in your caravan, motorhome, boat or in the sewage plant. Blue Bio toilet fluid is formaldehyde, glutaraldehyde and biocide free (harmful substances contained in many toilet fluids) and works with natural bacteria to breakdown sewage. This greatly reduces its impact on the environment and brings disposal costs down (associated with chemical disposal). It’s non-hazardous and 100% biodegradable, making it the friendly chemical toilet fluid that works!
Usage Information
When using Blue Bio toilet fluid for the first time, empty both the waste and flush tank of all previous chemicals and rinse thoroughly, otherwise the enzyme producing organisms in Blue Bio toilet fluid are likely to be adversely affected. Do not use bleach or any other harsh disinfectant/detergent based cleaning fluid in the toilet bowl as this will also effect Blue Bio’s performance (kills the good organisms). If you are using Blue Bio toilet fluid for the first time, we recommend a double dose (booster). After the first dose, use the standard recommended amount.
Cassette/Waste Tanks & Flush Tanks: We recommend a 20ml dose for the toilet cassette/waste tank. A 10ml dose for the flush tank. A single dose (in both the waste and flush tank) should be effective for 3/4/5 days (freezing temperatures may effect this). After this time period another dose may be necessary.
Septic Tanks, Boat Holding Tanks & Grey Water Tanks: We generally recommend a 20ml dose in septic and grey water tanks too.
Storage: Store away from direct sunlight at temperatures preferably between 0°C and 48°C. Avoid freezing. Once opened use within two years. Keep out of reach of children and store seperately from food and drink. See bottle label for more information.


Please contact us for technical data and material safety data sheets.

Classed as sewage NOT chemical waste
Blue Bio toilet fluid works through natural biological activity. Many toilet fluids work by using strong detergents, disinfectants and preservatives to control bad odours. This has two main problems:
1. They contain harmful substances that do not degrade easily/quickly in the environment (even when the product states it is biodegradable).
2. They actually hinder sewage farms because waste containing harsh toilet fluids kills the good bacteria, making it hard to breakdown sewage. Blue Bio toilet fluid contains specially selected ingredients, so it breaks down quickly and works with natural bacteria to degrade waste. Not only does it work with nature but Blue Bio toilet fluid is effective too. No need to compromise on performance, Blue Bio actually outperforms many harsh chemical toilet fluids with a smaller dose!
Blue Bio has been designed and made in our very own manufacturing plant – Wessex Manufacturing Ltd. Our factory is ISO 9001:2008 certified for high quality production standards. All our staff are IOSH trained (Institution of Occupational Safety and Health).

Blue Bio Toilet Fluid Reviews

Some of our favourite product reviews

  • “We loved the fact that one bottle does everything. No need for pink for the flush and blue for the waste. Saving on cost and on having to transport 2 bottles around....With up to 50 uses per bottle at a very competitive price – will we use it again? Most definitely!”

    Deb Ludford Blogger - In Pursuit of a Dream
  • "Hi, having just started using Blue Bio toilet fluid I am very impressed. In fact I have written to the Caravan Club asking if they can review it next time they are looking at toilet liquids. It definitely keeps the smells down far better than the "normal" liquids."

    Mel Brown
  • "We use the Blue Bio stuff, and it works really well. As the cassette had been used with formaldehyde previously it took a few cycles and good rinses to get rid of it, so persevere and don't give up when it pongs first use or two."

    john6767 on the forum
  • "The flush liquid kept the toilet bowl clean and fresh with a natural smell... This liquid is definitely worth a try - the best two points are the dosing system and the fact that you can use it for the flush tank and the waste tank. We thoroughly recommend it!!"

    Caravan Advice
  • "We have been using Blue Bio toilet fluid in our motorhomes for over a year and a half now. We use Blue Bio with the knowledge that there won't be any problems with its use abroad (Europe), where legislation on chemical toilet fluids can be very strict. Aside from that benefit, Blue Bio is very economical, with such a small dose, which has proven to be very cost effective. It also ticks the boxes of looking and smelling nice too."

    Mr Harvey Cracknell, Abacus Motorhome Hire
  • "Blue Bio toilet fluid is a marvellous product. I live in a motorhome all year round and at times, on festival sites, it has been a life saver!"

    Tracy Harrison, Tracy’s Hygiene Crew
  • "Blue Bio toilet fluid is an environmentally-friendly toilet chemical that you really must try... The one per cent dilution means a bottle of Blue Bio will go a long way... It's the operating effectiveness that makes this treatment special."

    Mr John Wickersham, Writer of Caravan & Motorcaravan manuals, published by Haynes
  • "AWARD WINNER 2010, Best Accessories Category."

    Practical Caravan Magazine (Haymarket Leisure Group) 2010


Welcome to our online Shop!

Blue Bio Toilet Fluid

1 Litre Dosing Bottle

£12.99 Including VAT

+ Postage & Packaging
(Flat rate on all orders £4.99)

Suitable for Cassette, Waste & Flush tanks in Caravans, Motorhomes & Boats. Also suitable for portable camping toilets, boat holding tanks, septic tanks and grey water tanks.
2 x 1 Litres Blue Bio Toilet Fluid

£25.98 Including VAT

Free delivery when you buy 2×1 litres

Pre Season Pack. Get your trip off to a clean start with our new pack of essential items and save over £25.00.
Pre Season Pack – 1 x 1 litre Blue Bio Toilet Fluid
1 x 750 ml Glass Cleaner
1 x 750 ml Odour Eliminator
1 x 750 ml Waterless Wash
2 x Microfibre Cloths

Now available at a discounted price until the end of May 2017

£39.99 £32.99 Including VAT and delivery

Bathroom Cleaner

750ml Spray Bottle

£8.99 Including VAT

+ Postage & Packaging
(Flat rate on all orders £4.99)

Biological cleaner that is compatible with Blue Bio Toilet Fluid. Suitable for cleaning the toilet bowl, sink, shower and any other hard surface in the toilet and bathroom. Can be used at home or in the Caravan, Motorhome or Boat.

PayPal Acceptance Mark


PLEASE NOTE: Unfortunately we can only ship around the UK as shipping costs abroad are very expensive. Postage and packaging prices are for mainland UK, EXCLUDING Northern Scotland. For Northern Scotland (including Aberdeenshire and Highlands), Outer Islands, Northern Ireland, Isle of Man, please contact us by email or phone for a delivery quote. If you live in the Republic of Ireland, Channel Islands, Australia or anywhere else in the World, please contact us directly for help.

A breakdown of our UK postage costs:
We charge a standard flat rate of £4.99 for all UK mainland deliveries. Most packages are shipped within 1 or 2 working days.

P&P prices will be added automatically in Paypal.

PLEASE NOTE: As a rule we do not offer Saturday deliveries because they are very expensive. If you would like a Saturday delivery, please get in touch for a quote.


Blue Bio in Australia…

Blue Bio is available in Australia through our partnership with the Charleski Group. The new Australia ecommerce website is under construction but in the meantime please contact either Jonathan or Laura by email: or

Welcome to the New Blue Bio website! So what’s new?

Here at Blue Bio we’ve added an online shop to the new website. So you can buy easily from the manufacturer. We’ve put the focus back on the main seller – Blue Bio toilet fluid. Which continues to sell across the UK and Australia.

Look out for a new stockists page for the UK and a new website for all our Australia customers.

Check back soon. We hope you like our new responsive and modern website.

Thanks, J

Contact Us

Just like Blue Bio bacteria, we’re a friendly bunch, so please get in touch!

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Wessex Chemical Factors
9 Crane Way, Woolsbridge Industrial Park, Three Legged Cross, Wimborne, Dorset, BH21 6FA
United Kingdom (UK)
Tel: ( 44) 01202 823699
Fax: ( 44) 01202 813863
VAT No. 768 8396 54