10 Best Rv Chemicals For Black Water Tank of 2025

Tested and Reviewed: Top 10 Rv Chemicals For Black Water Tank deals with expert ratings from 8.1 to a perfect 10

July 2025 Edition

Editor's Choice

9.7

Save 15%

Camco

Camco TST MAX Toilet Treatment Singles for Camper & RV - Pack of 8 Single-Use 4oz Bottles in Orange Scent - Control Unwanted Odors & Break Down Waste and Tissue - Safe RV Septic Tank Treatment (41191)

15% OffFree Shipping

Editor's bottom line:

“This rv chemicals for black water tank is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Toilet Deodorizer with Reactive Odor-Eliminating Technology: Experience a powerful RV odor eliminator that stops RV black tank odors for up to 7 days. Just (1) bottle treats camper toilets with up to a 40-gallon tank.
Superior Formulation, Unmatched Performance: Get exceptional results with TST MAX RV tank treatments. The advanced chemistry is safe for septic systems.
Powerful RV Black Tank Treatment: Eliminate clogs & odors in your camper/marine black water tank. This liquified RV black tank treatment breaks down waste & RV toilet paper, while also aiding in waste digestion for optimal sensor performance.
Multi-Purpose: This RV Accessory is great For boating, full-time/occasional camping, boondocking, & portable camping toilets. Be sure to have this camper must-have with the rest of your camping supplies.
Made in the USA: Camcos TST RV toilet chemicals are proudly Made in the USA & trusted by RVers and boaters For their holding tank Treatment needs.
Refreshing Scent, Quantity: Enjoy a pleasant, long-lasting citrus scent as you're RVing without worrying about septic tank odors ruining your experience. Includes (8) single 4-ounce Bottles.

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Picked by 221 people today

9.5

Unique

Unique RV Digest-It+, Extra-Strength Black Tank Treatment - Liquifies Waste and All Brands of Toilet Paper - Odor Eliminator (32 oz)

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Main Highlights

Faster and more effective waste and RV tissue digester. RV Digest-It+ RV black tank treatment breaks down waste and all brands of toilet paper, preventing pyramid plugs and making dumping easier.
Our strongest complete RV tank treatment, significantly stronger than RV Digest-It Classic. Breaks down clog-causing waste and eliminates porta potty smells and sewer odors in your tank.
Maintains working sensor probes. Stops black water tank sensor probes from misreading by liquifying waste before it builds up and clings to probes. Digests grease, oil, and food debris in gray tanks.
RV Digest-It Plus camper toilet treatment is designed to work with The Unique Method to ensure clog- and odor-free camping, no matter what your style is: hookups, dry camping, full-time, extreme heat.
RV Digest-It+ is Unique. Family-owned, formulated, and manufactured in Arvada, CO. Campground- and home-septic safe. California compliant. Recommended by RV techs. Carried by thousands of retailers from coast to coast.

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9.5

Unique

Unique RV Digest-It+ Extra-Strength Black Tank Treatment Pod - Liquifies Waste and All Brands of Toilet Paper - Eliminates Odors at the Source (16 Pods)

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Main Highlights

Faster and more effective waste and RV tissue digester. RV Digest-It+ RV black tank treatment breaks down waste and all brands of toilet paper, preventing pyramid plugs and making dumping easier.
Our strongest complete RV tank treatment, Significantly stronger than RV Digest-It Classic. Breaks down clog-causing waste and eliminates porta potty smells and sewer odors in your tank.
Maintains working sensor probes. Stops black water tank sensor probes from misreading by liquifying waste before it builds up and clings to probes. Digests grease, oil, and food debris in gray tanks.
RV Digest-It Plus camper toilet treatment is designed to work with The Unique Method to ensure clog- and odor-free camping, no matter what your style is: hookups, dry camping, full-time, extreme heat.
RV Digest-It+ is Unique. Family-owned, formulated, and manufactured in Arvada, CO. Campground- and home-septic safe. California compliant. Recommended by RV techs. Carried by thousands of retailers from coast to coast.

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9.2

Save 13%

Camco

Camco TST MAX Camper/RV Toilet Treatment 1-Gallon - Control Unwanted RV Sewer Odors & Break Down Waste and RV Toilet Paper - Biodegradable Septic Safe Formula - Orange Scent (41173)

13% OffFree Shipping

Main Highlights

Toilet Deodorizer with Reactive Odor-Eliminating Technology: Experience a powerful RV odor eliminator that stops RV black tank odors for up to 7 days. Just 2 oz treats camper toilets with up to a 40-gallon tank.
Superior Formulation, Unmatched Performance: Get exceptional results with TST MAX RV tank treatments. The advanced chemistry is safe for septic systems.
Powerful RV Black Tank Treatment: Eliminate clogs & odors in your camper/marine black water tank. This liquified RV black tank treatment breaks down waste & RV toilet paper, while also aiding in waste digestion for optimal sensor performance.
Multi-Purpose: This RV Accessory is great For boating, full-time/occasional camping, boondocking, & portable camping toilets. Be sure to have this camper must-have with the rest of your camping supplies.
Made in the USA: Camcos TST RV toilet chemicals are proudly Made in the USA & trusted by RVers and boaters For their holding tank Treatment needs.
Refreshing Scent: Enjoy a pleasant, long-lasting citrus scent as you're RVing without worrying about septic tank odors ruining your experience.
Quantity: Each jug Includes 1-gallon.

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9.0

Save 23%

Camco

Camco TST Camper/RV Grey Water Odor Control - Removes Grease Buildup in Gray Water Tank, Sink & Shower Drains - 4oz Treats 40-Gal Holding Tank - Safe Septic Tank Treatment - Lemon, 64 oz (40256)

23% OffFree Shipping

Main Highlights

RV Grey Water Tank Treatment: Effectively cleans your RV's grey water system by removing tough grease buildup from tanks, sinks, and shower drain lines, helping to prevent clogs and maintain smooth water flow during your adventures.
Powerful RV Holding Tank Deodorizer: Neutralizes unpleasant odors caused by waste and residue, replacing them with a clean, refreshing scent, so your camper remains inviting and odor-free, whether you're on the road or parked at your favorite spot.
Safe for Septic Tanks: Crafted with care for the environment, this solution is septic tank-safe, formaldehyde-free, and non-stainingdelivering powerful results while protecting your RV & minimizing environmental impact.
Convenient & Easy to Use: Simplify RV maintenance with this 64 oz concentrated formula. Just 4 oz treats a 40-gal. tank with maximum efficiency. Stay a happy camper with this camping essential for a fresh, clean RV on all your adventures.
Lasting Fresh Lemon Scent: Infuses your RV grey water tank with a crisp lemon fragrance, eliminating any lingering odors and keeping your RV smelling clean and welcoming.
Eliminates odors
Remove grease buildup in your grey water system
Fresh lemon scent
64 oz. Bottle
4 ounces treats 40 gallon grey water tank

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8.8

Save 8%

Walex

Walex Porta-Pak Black Holding Tank Deodorizer & Portion Control System Drop-Ins - Rapid Breakdown of Waste & Paper, Odor Prevention, Cleans Tank & Sensors - Fresh Scent, 10-Pack

8% OffFree Shipping

Main Highlights

WASTE BREAKDOWN - Porta-Pak RV Marine Holding Tank Deodorizer breaks down waste and stubborn RV toilet paper, keeping your holding tank sensors working effectively. No more clogs or backups.
HOLDING TANK DEODORIZER - Porta-Pak marine and RV holding tank deodorizer tackles unpleasant smells. Say goodbye to embarrassing odors with your boat, camping toilet, and RV toilet tabs.
VERSATILE FOR ALL TANKS - Our marine and RV tank deodorizer for black tank cleans tanks from 2.5 gallons - 40 gallons. Ideal for RVing, boating, boondocking, and portable camping cassette toilets.
FRESH 10 PACK - Our marine and RV drop ins for toilets dissolve immediately upon contact with water. Just Drop it in - no messy spills. Non-staining color.
MADE IN USA - Walex has been a global leader in developing and manufacturing premium odor control and sanitation products since 1987.

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8.6

Save 26%

Thetford

Thetford 96634 Aquamax Spring Showers 6-8 Oz, No Color, 48 Fl Oz (Pack of 1)

26% OffFree Shipping

Main Highlights

Enzymes optimized for MAX performance
Septic system safe
Campground and Marina Friendly
Compliant with all current regulations
Convenient family of options; liquids, dry granules and Toss-Ins

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Best Value

8.3

Save 28%

Camco

Camco TST MAX Camper/RV Toilet Treatment Drop-INs - Control Unwanted Odors & Break Down Waste and Tissue - Safe Septic Tank Treatment - Orange Scent, 30-Pack (41183)

28% OffFree Shipping

Main Highlights

Toilet Deodorizer with Reactive Odor-Eliminating Technology: Experience a powerful RV odor eliminator that stops RV black tank odors for up to 7 days. Just (1) toilet drop in treats camper toilets with up to a 40-gallon tank.
Superior Formulation, Unmatched Performance: Get exceptional results with TST MAX RV tank treatments. The advanced chemistry is safe for septic systems.
Powerful RV Black Tank Treatment: Eliminate clogs & odors in your camper/marine black water tank with TST MAX. This powerful solution breaks down waste & RV toilet paper, while also aiding in waste digestion for optimal sensor performance.
Multi-Purpose: This RV accessory is great for boating, full-time/occasional camping, boondocking, & portable camping toilets. Be sure to have this camper must-have with the rest of your camping supplies.
Made in the USA: Camcos TST RV toilet chemicals are proudly made in the USA & trusted by RVers and boaters for their holding tank treatment needs.
Refreshing Scent - Quantity: Enjoy a pleasant, long-lasting citrus scent as you're RVing without worrying about septic tank odors ruining your experience. Each bucket includes (30) Drop-INs.

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8.1

Liquified RV Toilet Treatment

Liquified RV Toilet Treatment - Black Holding Tank Digester - Odor Eliminator - Orange Scent - Matts RV Reviews (Orange, 32oz)

Free Shipping

Main Highlights

Breaks Down Waste for Easy Dumping: Our enzyme-based solution liquifies solid waste and toilet paper to make dumping smooth and easy. Eliminate years of build-up in your black tank with our powerful formula.
Fights Against Tank Odor: Get rid of foul black tank odor at the source with this product. This breaks down odor-causing bacteria and leaves a wonderful orange scent.
Helps Prevent Sensor Malfunction: Its cleaning superpower helps eliminate years of buildup on sensors so you can get a more accurate reading of your black tank levels.
100% Biodegradable: Our formula is environmentally friendly and safe for all septic systems. It contains no formaldehyde so you can feel safe with it around pets and children.
Made in USA: Liquified is proudly made in Elkhart, Indiana--the RV capital of the world! We have listened to feedback from fellow RVers to create this amazing product.

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8.1

Happy Campers

Happy Campers RV Toilet Treatment 18 - Extra Strength Odor Eliminator for Black and Gray Holding Tanks

Free Shipping

Main Highlights

Powerful Odor Control: Say goodbye to unpleasant odors with our powerful formula that neutralizes and eliminates foul smells, leaving your RV smelling fresh and clean.
Effective Waste Digestion: Happy Campers breaks down waste and toilet paper quickly and efficiently, preventing clogs and ensuring smooth tank operation.
Long-Lasting Performance: Our concentrated formula means a little goes a long way. A single treatment provides lasting results, saving you money and hassle.
Safe for All Tanks: Compatible with all septic systems and holding tank materials, our treatment is versatile and reliable, ensuring optimal performance in any RV or marine environment.
Easy to Use: Simply add the measured amount of Happy Campers to your holding tank, and let our formula do the rest. No mess, no fuss just straightforward application for a worry-free adventure.
Versatile Application: Ideal for use in RVs, boats, and portable toilets. Wherever your journey takes you, Happy Campers will keep your sanitation system operating at its best.

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Our Best Overall Choice

Best Choice

9.7

Camco

Camco TST MAX Toilet Treatment Singles for Camper & RV - Pack of 8 Single-Use 4oz Bottles in Orange Scent - Control Unwanted Odors & Break Down Waste and Tissue - Safe RV Septic Tank Treatment (41191)

15% OffFree Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Toilet Deodorizer with Reactive Odor-Eliminating Technology: Experience a powerful RV odor eliminator that stops RV black tank odors for up to 7 days. Just (1) bottle treats camper toilets with up to a 40-gallon tank.
Superior Formulation, Unmatched Performance: Get exceptional results with TST MAX RV tank treatments. The advanced chemistry is safe for septic systems.
Powerful RV Black Tank Treatment: Eliminate clogs & odors in your camper/marine black water tank. This liquified RV black tank treatment breaks down waste & RV toilet paper, while also aiding in waste digestion for optimal sensor performance.
Multi-Purpose: This RV Accessory is great For boating, full-time/occasional camping, boondocking, & portable camping toilets. Be sure to have this camper must-have with the rest of your camping supplies.
Made in the USA: Camcos TST RV toilet chemicals are proudly Made in the USA & trusted by RVers and boaters For their holding tank Treatment needs.
Refreshing Scent, Quantity: Enjoy a pleasant, long-lasting citrus scent as you're RVing without worrying about septic tank odors ruining your experience. Includes (8) single 4-ounce Bottles.

Show Price

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