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SALE - Tank Fresh

Tank Fresh by Bio-Pro Research is a 'charter tough' product that uses high-performance bio-enzymatic technology specifically formulated to remove odours from holding tanks, hoses and pumps. Tank Fresh uses a simple 'flush' application to treat the entire system. 100% biodegradable. Available in 1L.

Availability: In Stock

On sale! $15.00 (inc GST)

$20.00 (inc GST)

(price reduced by $5.00)


Tank Fresh Features & Benefits


Why choose Tank Fresh?

• Removes odours - eliminates the source of unpleasant odours

• Simple to use - the application is the same for all holding tanks

• 100% biodegradable - safe and environmentally friendly

• Cost effective - 20 applications per bottle at $1.12 per application

• No blue dyes or chemical smells - clear formula with a pleasant fragrance

• Compact size -  ideal for storing on boats or RVs where space is limited


Tank Fresh contains enzymes and non-pathogenic micro-organisms in a complex blend of surfactants. Contains no hazardous materials. Proper use of Tank Fresh will eliminate the source of unpleasant odours in each of the head system components found in boats and RV toilets. The four main sources of holding tank odours are waste deposits within:

• The head's flush mechanism

• The hoses between the head, pump and holding tank

• The holding tank vent line

The holding tank itself


Initial Application

Applications must be made into each individual head as they have separate plumbing lines and pumps even if there is a common holding tank. Fill each toilet bowl with water and pour in 50ml of Tank Fresh and swirl to mix, then flush the head. On an initial application, repeat this process twice as this flushes one mixture into the holding tank and the second flush mixture will stay working in the pump and plumbing lines to eliminate odours.


Ongoing Application

For complete long-term odour control, practice the First-Flush, Last-Flush Process. Upon boarding your boat for use, add a single application of Tank Fresh to each head. And at the end of the cruise before leaving the boat, add two flush applications of Tank Fresh to each head (see Initial Application above). This will keep Tank Fresh working in the head, lines, pump, holding tank and vent lines while the boat is docked between cruises.


If your hoses are older, they may be saturated with waste odours that are released through the hose walls. Use Tank Fresh for the insides, and periodically apply Urine Off to the outside of the hoses to eliminate these odours.



• 1L (33.78 FL OZ) bottle with side measure


Certified Biobased Product

Bio-Pro Research leads the way with its pioneering approach to stain and odour removal by having 81 of its biobased products certified in the United States Department of Agriculture (USDA) BioPreferred Certification Program. Tank Fresh has been awarded the USDA BioPreferred designation as a Certified Biobased Product for its innovative bio-enzymatic technology and is described as being “far more effective than traditional chemical methods for the removal of organic stains and odours, while being safe for materials, humans, and the environment.”

  • Tank Fresh MSDS
    Material Safety Data Sheet. Published by Bio-Pro Research.