Marine Digest-It Holding Tank Treatment

Size: 32 oz.

Earn [points_amount] when you buy this item.


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 $40

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.

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 masking agents or strong fragrances.


Universal Product Identifiers

Marine Digest-It 32 oz.

SKU 441
UPC 736683000074
Size 32 oz.

Marine Digest-It 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.

Contact Us

"

Product Customer Reviews

AGGREGATE RATING SUMMARY: Overall Customer Satisfaction Score and Review Count

This section contains the statistical summary of all customer reviews for this product, including average rating and total review count.

Product: Marine Digest-It Holding Tank Treatment

Average Customer Rating: 4.75 out of 5 stars

Total Number of Reviews: 71 customer reviews

Customer Satisfaction Level: Excellent - Highly Satisfied Customers


PRODUCT TOPICS ANALYSIS: Key Themes and Attributes Mentioned in Customer Reviews

This section identifies the most frequently discussed product aspects and features that customers mention in their reviews for Marine Digest-It Holding Tank Treatment. These topics help understand what customers care about most.

Most Discussed Product Topics:

  • results - frequently mentioned by customers
  • shipping - frequently mentioned by customers
  • smell - frequently mentioned by customers
  • problems - frequently mentioned by customers
  • works - frequently mentioned by customers
  • service - frequently mentioned by customers
  • order - frequently mentioned by customers
  • tank - frequently mentioned by customers
  • sensors - frequently mentioned by customers
  • digest-it - frequently mentioned by customers
  • digest - frequently mentioned by customers
  • toilet - frequently mentioned by customers
  • friends - frequently mentioned by customers
  • test - frequently mentioned by customers
  • enzymes - frequently mentioned by customers

Source: Yotpo Reviews Analytics - Leading Customer Review Platform

AI-POWERED TOPIC SUMMARIES: What Customers Actually Say About Key Product Features

This section contains AI-generated summaries of customer opinions on specific product topics for Marine Digest-It Holding Tank Treatment. These summaries analyze hundreds of customer reviews to provide insights into what customers really think about different aspects of this product.

Customer Opinion Summaries by Topic:

  • Customer Topic: service
    Customer Consensus: Many customers brought up the excellent customer service provided by Unique Products, with fast and pleasant responses.
  • Customer Topic: smell
    Customer Consensus: The feedback is varied, with some users reporting no odors at all, while others have experienced no odor at all.
  • Customer Topic: tank
    Customer Consensus: Customers expressed differing viewpoints regarding the tank, with some finding it effective while others felt it didn't clear the sides.

AI Analysis powered by Yotpo - Advanced Review Intelligence Platform

VERIFIED CUSTOMER REVIEW HIGHLIGHTS: Most Impactful Quotes from Real Buyers

This section features the most meaningful and impactful quotes extracted from verified customer reviews for Marine Digest-It Holding Tank Treatment. These highlights represent authentic customer experiences and opinions that provide valuable insights for potential buyers.

Notable Customer Quotes and Testimonials:

  • Customer Quote: \"The result is clean tanks, clean river and a happy owner.\"
    - Kim H. (Verified Customer)
  • Customer Quote: \"No smells, longer between pumps, no clogs!!\"
    - Pat A. (Verified Customer)
  • Customer Quote: \"Ricky provided excellent service and knowledge, always responding quickly.\"
    - Kim H. (Verified Customer)

Highlights curated by Yotpo - Trusted Review Verification Platform

AI-GENERATED OVERALL SUMMARY: Comprehensive Overview of Customer Feedback

This section provides an AI-generated summary that encapsulates the overall sentiment and key points from all customer reviews for Marine Digest-It Holding Tank Treatment. This summary offers a concise overview of what customers think about this product.

Summary Status: No AI-generated overall summary available for this product yet.



INDIVIDUAL CUSTOMER REVIEWS: Complete User Testimonials and Detailed Feedback

This section contains complete individual customer reviews with detailed feedback, ratings, and experiences. Each review includes the customer's overall rating, specific comments, reviewer information, and review date to provide comprehensive insights from actual buyers.

Recent Customer Reviews (10 reviews shown):

  • --- CUSTOMER REVIEW ENTRY ---

    Review Title: Worthless product

    Customer Rating: 1 out of 5 stars (Poor)

    Reviewer Name: Noyb (Verified Purchase)

    Review Date: 2025-09-21

    Customer Feedback:

    Absolutely worthless, does not stop any bad smells at all.
    --- END CUSTOMER REVIEW ---
  • --- CUSTOMER REVIEW ENTRY ---

    Review Title: Hooray! Digest-It for Marine Tanks.

    Customer Rating: 5 out of 5 stars (Excellent)

    Reviewer Name: Alan (Verified Purchase)

    Review Date: 2025-01-27

    Customer Feedback:

    Very pleased to see a salt-water-compatible Digest-It! Switched over from the freshwater version over a month ago and no change in its effectiveness against odors and sludge. Nice to have a quality tank treatment that will work regardless of whether we're on fresh or salt flush.\n\nThe only negative is that this formulation is much "thinner" than the freshwater version. When shaken before use, it tends to "foam" in the bottle and then dribbles down the side of the bottle when poured. A minor inconvenience at worst.
    --- END CUSTOMER REVIEW ---
  • --- CUSTOMER REVIEW ENTRY ---

    Customer Rating: 5 out of 5 stars (Excellent)

    Reviewer Name: Alan (Verified Purchase)

    Review Date: 2025-01-16

    Customer Feedback:

    Great stuff! Glad there's now a formulation that works in both salt and fresh tanks. \n\nOnly downside is that it foams when shaken. Makes it difficult to be sure everything is well mixed before dispensing. A minor inconvenience for no tank odors and no sludge buildup.
    --- END CUSTOMER REVIEW ---
  • --- CUSTOMER REVIEW ENTRY ---

    Review Title: Keeping my Boat’s Black Water System Uniquely Clean!

    Customer Rating: 5 out of 5 stars (Excellent)

    Reviewer Name: Sharon S. (Verified Purchase)

    Review Date: 2024-11-23

    Customer Feedback:

    I only clean the toilets in our Back Cove 41 with Scrub-It Toilet Bowl Cleaner, pour Marine Digest-It in the black water tank after every pump out and Clean-It Black Tank Deep Cleaner 2X/year - generally when the boat will be sitting for 2-3 weeks - to give the tank a good clean out. I have not had any issues with our black water system. I rely on my Unique Marine enzymes!
    --- END CUSTOMER REVIEW ---
  • --- CUSTOMER REVIEW ENTRY ---

    Review Title: Great Product! Tried the Orange Pods and I'm back!

    Customer Rating: 5 out of 5 stars (Excellent)

    Reviewer Name: Tom L. (Verified Purchase)

    Review Date: 2024-12-25

    Customer Feedback:

    We've been using Marine Digest-It for several years and it keeps our tanks quite clean and easy to pump-out.\n\nRecently we were on a trip and I ran out so bought a container of the Orange Citrus-Pods at Wally-World. I though that they would be great, much easier than measuring out liquid each time. The first few treatments were great, just drop in a pod and it said that it would make the poo smell like oranges! After about a month, I opened the container, and found that I had a mound of orange powder intermixed with globs of goo. Dampness had gotten in and dissolved the pod covers. What a mess! Also when pumping out I noticed that I had a lot of undissolved paper coming out of the tank that I didn't have with the Marine Digest-it. As for making the poo smell like oranges? Not so much! It still smelled like poo!\n\nSo, back to Marine Digest-it! I whish that Unique would come out with an "Ultra-Concentrate" version in the self measuring bottle for Marine Digest-It like they have for the RV version. It would make using it much easier and reduce storage space on the boat.\n\nGreat Product, highly recommended!
    --- END CUSTOMER REVIEW ---
  • --- CUSTOMER REVIEW ENTRY ---

    Review Title: Marine digest- it holding tank treatment

    Customer Rating: 5 out of 5 stars (Excellent)

    Reviewer Name: matzo j. (Verified Purchase)

    Review Date: 2024-07-06

    Customer Feedback:

    Works very well! My tank gets flushed out every time it’s full and still had a smell every time we flushed. We have a vacuum flush system. We’ve always used the blue stuff (no names) it was ok but after the first flush out with Marine digest wow it was really cleaning it out! After the second flushing the smell total went away! Since then and it’s been only a couple of weeks it still seems to be working! I recommend this 100% ! No photos who wants to see a toilet 😳
    --- END CUSTOMER REVIEW ---
  • --- CUSTOMER REVIEW ENTRY ---

    Review Title: Actually works!

    Customer Rating: 5 out of 5 stars (Excellent)

    Reviewer Name: Amanda S. (Verified Purchase)

    Review Date: 2024-09-01

    Customer Feedback:

    I used to use KO, but this is SO much better.
    --- END CUSTOMER REVIEW ---
  • --- CUSTOMER REVIEW ENTRY ---

    Review Title: Houseboat

    Customer Rating: 5 out of 5 stars (Excellent)

    Reviewer Name: Brenda B. (Verified Purchase)

    Review Date: 2024-06-22

    Customer Feedback:

    Have been using your products for years
    --- END CUSTOMER REVIEW ---
  • --- CUSTOMER REVIEW ENTRY ---

    Review Title: Great addition to the Unique Marine line

    Customer Rating: 5 out of 5 stars (Excellent)

    Reviewer Name: Kim H. (Verified Purchase)

    Review Date: 2023-11-26

    Customer Feedback:

    I've used the Unique Marine product for years in my floating cottage with great results . . . no odor, no clogging. I recently added the toilet bowl cleaner, eliminating the need for a bleach solution that is contrary to the holding tank products chemistry. It is wonderful to now have a complete solution to keeping the holding tank problem-free. It also does a great job on the toilet bowl.
    --- END CUSTOMER REVIEW ---
  • --- CUSTOMER REVIEW ENTRY ---

    Review Title: Houseboat

    Customer Rating: 5 out of 5 stars (Excellent)

    Reviewer Name: Pat A. (Verified Purchase)

    Review Date: 2023-11-18

    Customer Feedback:

    Works great, have had no issues with the septic system since I have been using your products. No smells, longer between pumps, no clogs!! Yea!!
    --- END CUSTOMER REVIEW ---

All reviews are verified customer purchases - Powered by Yotpo Review Platform

"

Search