Marine Digest-It Holding Tank Treatment

Unique Camping + Marine

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Wave Goodbye To Sludge Buildup, Odors, and Misreading Sensors

Powered By The Most Advanced Bacteria & Enzyme Formula Available

  • Digests solid waste and residual sludge in holding tanks
  • Helps remove more waste with every pump out
  • Eliminates foul toilet and tank odors
  • Cleans and maintains tank sensors and level gauges
  • Treats black, gray, and galley tanks
  • Digests all brands of toilet paper
  • Reverse years of waste and sludge buildup
  • Formaldehyde-free formula
  • Works in salt water
  • Proudly made in the USA
  • Formulated with trust - contains no hidden chemicals
  • Free Shipping On Orders Over $30


The Problem

Over time sludge can quietly build up inside your holding tank causing odors, reduced tank capacity, and inaccurate sensor readings. Toilet odors and tank clogs are the last thing you, or your guests, want to deal with. You need a simple solution that solves these problems at their core so you can spend less time worrying about your holding tanks and more time enjoying your boat.

The Solution

Unique Marine Digest-It’s advanced blend of bacteria and enzymes is specially designed to break down holding tank sludge inside your boat’s holding tank, allowing you to effectively pump out the entirety of the waste inside your tank - leaving behind no sludge or residue. Not only will this help keep your tanks free from sludge, extending the time between pump outs, Marine Digest-It will also eliminate foul toilet odors that can ruin time spent on your boat. Marine Digest-It not only eliminates sludge and odors, it also cleans and maintains tank sensors, allowing you to know exactly what your levels are inside your tank. It digests all brands of toilet paper, is formaldehyde free, eco-friendly, and totally safe for you and the environment.

Keep Your Boat's Holding Tanks Clean and Clear

The Science

Marine Digest-It uses a proprietary blend of bacteria and enzymes to do the work of breaking down solid waste inside your tank and eliminating odors. The sludge inside your holding tanks is a perfect food source for the bacteria that powers Marine Digest-It. Once the bacteria encounters the sludge (feces, urine, and toilet paper), it becomes active and begins to eat. As the bacteria works, it produces enzymes. These enzymes help break the waste down into more easily digestible portions for the bacteria so they can completely eat and digest the waste, leaving you with sludge-free, fresh smelling tanks.

The bacteria-enzyme blend in Marine Digest-It is also specially formulated to force out the bad, odor-creating bacteria (anaerobic) and replace it with good bacteria (aerobic) so sewer odors are eliminated at their source without using any dangerous chemicals, masking agents, or strong fragrances.

Additionally, by using Marine Digest-It, you can rest assured knowing that your holding tank treatment isn’t damaging the very waterways you love. The non-pathogenic bacteria inside Marine Digest-It is eco-friendly, safe for marine life, and can be safely used in both fresh and saltwater.

Universal Product Identifiers

Marine Digest-It 16 Treatment 32 oz.

SKU 441
UPC 736683000074
Size 32 oz.

Marine Digest-It 64 Treatment 128 oz.

SKU 442
UPC 736683000203
Size 128 oz.

Safety Information

Learn more about this product, including SDS, here.

Need Help?

Let our world-class customer support team help you solve your problem or read our boat FAQ's here.

Contact Us

All Unique Camping + Marine products are proudly made inside the USA. Clean and maintain RV wastewater systems with American Made solutions. 

Made In The USA

We are proud to say that every ingredient we use is sourced and made here in the U.S.A. We proudly work with other quality American businesses to ensure that the products you get today are helping to build a better economic future for this country.


All of our products are guaranteed to work or your money back. We stand 100% behind our products. 

Our Promise

Everything we do comes with unparalleled support from the wastewater experts at Unique Camping + Marine, located right here in the USA. If for some reason you don't love the results, we'll return your money without hassle!


All of Unique Camping + Marine products are made with both the customer and the environment in mind. Formulated with trust. 

Products You Can Trust

Many other products claim to be organic, safe, or natural, but a closer look at their labels reveal that these products contain dangerous ingredients that can cause serious harm to you and the environment. Unique has been trusted for over 20 years by conscious consumers who are looking for more transparency and safer alternatives. Our products never contain hidden chemicals so you can make an informed decision about what you bring into your home and feel confident that our products live up to your standards for safety and environmental responsibility.


Unique Camping + Marine products comply with state regulations and are safe for septic systems 

State Compliant

Unique Camping + Marine products comply with all state and national laws protecting septic systems, groundwater and the environment. Prohibited ingredients like formaldehyde and bronopol have never, and will never be used in any of our products.