Written By Car Bibles Staff
Published Sep. 17, 2019

Owning an RV is a big responsibility on all fronts. It may be smaller than a regular house but best believe that it takes quite a lot to maintain. This is especially true when it comes to the areas of sewage and septic systems. The whole set-up is not as elaborate as the ones found in regular homes; nevertheless it needs to be well managed to avoid foul smells. RV holding tank treatments go a long way to ensure that waste is broken down resulting in an odor-free living space. With so many options out there on the market, it is important to be able to separate the weeds from the tare. For that reason, here is a detailed compilation of the best RV holding tank treatment options out there.

The Best RV Holding Tank Treatment

Eliminating foul odors is at the core of this incredibly potent formula. Whether the RV in question makes use of a black or grey or any other type of tank, it is just as potent. The Walex TOI-91799 Porta-Pak Holding Tank Deodorizer Drop-Ins are a one way stop to a fresh smelling septic system. This RV black tank treatment comes in little ‘paks’ which are a great avenue for portion control. Even better the enzyme formula within them is eco-friendly and just as effective as any chemical-based one. It begins work once applied and instantly begins to fight against foul odors and breaks down waste. It equally works wonders when it comes to clogs in the pipes, valves and other areas. With it’s a pleasant fresh alpine scent, it does wonders for RV holding tanks.

Key Features
  • It offers up top-notch odor prevention
  • Comes packaged in a zipper bag for easy storage
  • It happens to be Formaldehyde-free
  • Comes in highly biodegradable paks
  • Brand Walex
  • Model TOI-91799
  • Weight 12 ounces

They work efficiently when it comes to eliminating odor and breaking down waste

It is incredibly easy and straightforward to use

It offers up a premeasured amount of formula


It is not as effective on hot weather

Sometimes the paks stick together causing a mess in the long run

They do not do enough on the front of deodorizing

RV black water tank chemicals and tank chemicals, in general, can be extremely harsh. Based on that alone, products like the Happy Campers Organic RV Holding Tank Treatment is a viable option. It gets rid of all bad odors present in RV holding tanks without leaving behind any chemical or sewer smells. What makes it even better is that it is biodegradable. This translates to the fact that it is eco-friendly and also septic tank friendly. So, users can go to town on this RV holding tank cleaner with no guilt whatsoever. It practically liquidizes solid waste as well as the common enemy which is tissue paper. There’s no need to splurge on special types of tissue paper, this formula can break them all down. Topping that is the fact that it keeps on working, users do not have to add more before dumping.

Key Features
  • It has no chemical or sewer smell since it is completely odor-free
  • It is environmentally friendly and biodegradable
  • Works well in both hot and cold weather
  • Has the ability to liquefy waste
  • Brand Happy Campers
  • Model HC-64-oz
  • Weight 4.44 pounds

It is incredibly easy to use

It is really strong at liquefying the contents of the tank

The formula is a great odor combatant


It is messy to use since it comes in powder form

Comes off as dusty

Has the tendency to turn hard like plaster

Ironically, cleaning can be a very messy process. But that does not have to be the case all the time. With formula like the Walex BOI-11530 Bio-Pak Natural Holding Tank Deodorizer, this is a thing of the past. It comes in a convenient form that provides portion control while being incredibly easy to use. So, say goodbye to that normally messy process of cleaning your RV holding tank. Simply drop a pak in, and the rest is history. The formula also happens to be environmentally friendly and starts work instantly. It is also very great when it comes to keeping bad odors at bay quite effectively.

Key Features
  • It deodorizes and breaks down waste easily
  • Comes in a non-staining color
  • Comes pre-packaged for portion control purposes
  • It is septic tank safe
  • Brand Walex
  • Model BIO-11530
  • Weight 12 ounces

Works adequately in both cold and hot weather

It breaks down waste and prevents frequent dumping

It is environmentally-friendly and not harsh at all


It does not deodorize as it is advertised

Still comes off as though it is packed with chemicals

Not great value for money

Getting the best out of a product is one of the main reasons buyers go after it. If it cannot work to the maximum then there is really no use. Thankfully, the Camco 41533 30 Pack Strength TST Ultra-Concentrated Lavender Scent RV Toilet MAX Treatment is one of the best RV black tank cleaner options. The formula itself has been in the market for over 20 years and it ages like fine wine. So, not only does it keep odors at bay, but it also breaks down solid waste and tissue. This results of this potent formula can still be felt for up to 7 days after the first application. Every single Drop-in comes in a granular form embedded in a pouch that dissolves once in the water. That one pouch can easily be used for a 40-gallon tank. Yes, it is quite potent but users can rest assured that it does not contain compounds such as formaldehyde, pesticides or biocides.

Key Features
  • It is ultra-concentrated; one drop is enough for a 40-gallon tank
  • Void of any pesticides, biocides or the formaldehyde-releasing ingredient bronopol
  • Safe for all septic tanks
  • It has a fresh lavender scent
  • Brand Camco
  • Model 41553
  • Weight 3.55 pounds

It is incredibly easy to use

Does not cause any pressure build-up

Keeps the tank clean and pleasant smelling


The Ziploc bag used as the packaging does not stay closed

Users complained that the tank requires more than what the instructions suggest

Odor control is an issue

For a truly green and genuinely eco-friendly option, this is the way to go. Anyone who is not just after a clean tank but a healthy environment as a whole should look no further. The Unique RV Digest-It Holding Tank Treatment is the ultimate eco-conscious option. It is void of compounds such as Formaldehyde making it safe for humans, septic systems and the environment. In addition to this, it is great at breaking down waste. Once it is applied, it instantly begins to digest solid waste including all brands of tissue paper. In the long run, it actively dissolves compilations of sludge and scum. So, long-time RV users can highly benefit from this. While doing this, it also takes care of the basic stuff like guarding against clogs, cleaning and reducing odors. Then there’s the elephant in the room which is foul odors. Best believe that this highly potent formula deals with that as well. Better yet, it doesn’t matter whether the temperature is high or low, it works just fine.

Key Features
  • It dissolves solid waste and all types of toilet paper
  • Truly degradable and eco-friendly
  • Reduces foul odors in all sorts of varying conditions
  • It guards against clogs and also cleans level gauges
  • Brand Unique Camping & Marine
  • Model 413-az
  • Weight 2.4 pounds

It does wonders on clogs

Ensures that the tank drains faster and cleaner

Maintains the septic system and keeps it working well


It does not battle odors as advertised

Not great value for the money spent

It dissolves black tank weight inconsistently

In an ideal world, everything would smell fresh and scented. Unfortunately, people have to deal with foul smells from toilet systems. The good news here is that the RID-X RV Treatment Liquid can deal with all that. It takes on tank sludge like a champ, leaving it smelling fresher than ever. This can be credited to the natural bacteria in it that can easily break apart tissue and all other forms of waste. In fact, it contains strong cellulase enzyme which tackles the waste head-on. What’s even better is the fact that its gifts are not just privy to RVs. This powerful formula can be used in portable toilets and also in marine toilets. Also, it serves black, grey and other tanks alike. With this RV black water tank chemicals, application once a week is duly enough to give a long-lasting effect. The citrus scent is strong enough to keep everything fresh on the odor front. Equally, the RV holding tank itself will be as clean as ever.

Key Features
  • It is scientifically proven to break down waste and tissues
  • Comes in an easy to use a liquid formula which is up to 8 treatments per bottle
  • It contains patented bacteria and enzymes for the breaking down of waste and paper
  • Has a long-lasting citrus scent
  • Brand Rid-X
  • Model AX-AY-ABHI-55917
  • Weight 1.68 pounds

It is a fast working formula

Cleans tank sensors perfectly

It dissolves and breaks down waste quite adequately


It takes a lot of patience as the enzymes need time to work

It is messy to use

Odor control is a bit on the lacking side

Eliminating foul odor is the least of the duties that this holding tank tackles. It is packed with a variety of features that make it one of the best RV toilet treatment options out there. There is so many users can expect with the Camco TST Ultra-Concentrate Orange Scent RV Toilet Treatment. At the forefront is the fact that it enforces the breaking down of waste and tissue. In addition to this, it can be used in both RVs as well as marine waste tanks. So, it undoubtedly scores some extra points in terms of versatility. Then there’s the obvious fact that it eliminates bad odors through and through. With its strong citrus scent, it is the perfect combatant for any foul odors that RV holding tanks have to offer. What could possibly make an already optimal product better? It does not contain any Formaldehyde and happens to be non-staining. Thanks to these handy features, it is deemed completely safe for septic tanks. To crown it all up, there’s no mixing or prep needed, so its as convenient as ever.

Key Features
  • It breaks down waste in RV holding as well as  marine waste tanks
  • Does not require any mixing or measuring
  • Each bottle can treat up to 40-gallons
  • It is ultra-concentrated
  • Brand Camco
  • Model 41191
  • Weight 3.04 pounds

It helps the sensors start working properly

Tackles odor head on

It keeps black water tank completely order free


The bottle is flimsy and thin

It is hard to wipe up in case of a spill

Users may need more than the recommended amount

Now, this is the septic tank treatment of the 21st century. It is adequately scented, easy to use and most importantly, environmentally friendly. At its core, the Firebelly Outfitters RV Septic Tank Treatment is the number one enemy of waste. The deodorized tablets are targeted at entities that may disrupt the flow of waste. So, thanks to these babies, the flow of wastewater through the RV sewer hose kits among things, is eased. The only thing that can top that is the fact that it is incredibly easy to use. Cut out the time that would have been used measuring or diluting. This formula is conveniently pre-portioned for up to 40-gallon tanks. With the stipulated amount, a nice mulberry scent is sure to win over any foul odor. The cherry on the top here is the triple molecular technology. This goes a long way to provide top-notch and long-lasting odor control.

Key Features
  • It has a fresh mulberry scent
  • It happens to be Formaldehyde Free
  • Biodegradable and Septic safe
  • Happens to be pre-portioned for up to 40-gallon tanks
  • Brand Firebelly Outfitters
  • Model FBO-002
  • Weight 1.35 Pounds

It eliminates odor effectively

Simple and easy to use

It is great at breaking down solids in the tank


It can stain if not cleaned off immediately

More than one packet is needed at a go

The smell is too strong

Anyone in the market for the best RV black tank treatment is definitely in luck. This product offers extensive services on that front and others. So how on earth does the Thetford 24 oz RV Drain Valve Lubricant work? This formula is specifically designed to lubricate all sorts of waste treatment systems. So, the good news is that clogs and the sorts are no match for it. This liquid RV septic cleaner happens to be 100% biodegradable. It will equally do wonders on anything from a black to a grey water tank. Even more in terms of versatility, it is suitable to be used on boats and RVs alike. What it does is to coat the plumbing lines and as such, it guards against sticky valves. So, for anyone who has been having problems with waste evacuation altogether, this is a solid way out.

Key Features
  • It is 100% biodegradable and can be safely used for all waste treatment systems
  • Makes for a smooth operation when emptying tanks
  • Can work in both RV and boat drain valves
  • Guards against sticky valves
  • Brand Thetford
  • Model 15843
  • Weight 1.48 pounds

It is very easy to use

Temporally ensures that valves open and close smoothly

It works well as long as it is properly used


It is only a temporary fix

The price is a bit on the high side

There's a 50/50 chance of it working

More and more, people are beginning to care about the environment. For that reason, RV septic cleaner options like this are becoming the belle of the ball. The Thetford 128-Ounce EcoSmart FF Deod offers up a formaldehyde-free formula which is just as effective. It works by breaking down and liquefying solid waste in order to guard against clogs. It does this while ensuring that foul odors are kept well at bay. In addition to being as multifaceted as they come, this product is incredibly convenient. First, users will be pleased to know that this formula does not stain, it can simply be washed off with soap and water. Additionally, it is not toxic to humans or aquatic beings alike. The environment as a whole has nothing to fear when it comes to this highly effective treatment. All in all, users can rest assured that their tanks will be odor free and squeaky clean.

Key Features
  • It is biologically-based and non-toxic
  • Not harmful to humans and aquatic animals
  • Controls odors and breaks down solid waste
  • It contains limited surfactants that biodegrade
  • Brand Thetford
  • Model 369677
  • Weight 6.5 pounds

Great value for money

It is incredibly easy to use

The liquid is heavy and as such is unlikely to spill


Twice the recommended amount is needed

It does not tackle odor adequately

It is a little less toxic yet a little less effective

Best RV Holding Tank Treatment Buying Guide & FAQ

Sewage as a whole is tricky to deal with, but with the right products, it can become a breeze. The only issue here is that there is a wide range of options available on the market. Then there is the fact that all of them talk a big game. Based on this it is hard to know which option to go for. For that reason, here are some pointers to make the process more streamlined.

What to Consider When Buying an RV Toilet Treatment

  • Effectiveness

These products are not used for the most glamorous of jobs. In fact, their duties are plain disgusting. Based on this, users need to look out for a product that works speedily and efficiently. It should be able to dissolve or unclog as effectively as possible. In addition to this, it should be able to eliminate foul odors coming from the sewage. A product that can do all this is definitely the one to stick to.

  • Biodegradability

It may not seem like a major issue but the best kind of holding tank treatments are biodegradable. All in all, it should not be harmful to the environment. The formula is biodegradable ensures that it will break down naturally. Another important aspect is to check that these products don’t contain formaldehyde-releasing ingredients. This is even more harmful than other chemicals.

  • Price

They may not be the cheapest products out there, but it should not break the bank. Based on that, it should be within the right neighborhood price-wise. Before embarking on the journey of finding the best holding tank treatment, a budget should be established. With a little bit of effort, finding a product that ticks all the boxes should be easy without going above budget.

  • Type

Holding tank treatments come in different forms. Mainly, there are two types available which are the tablet and liquid form. They two of them are as similar as they are different. The tablet form is a lot less messy to use. Also, it is already conveniently measured. Though the liquid option may involve some sort of measurement and dilution, it has its strong point. Users do not need to wait for them to dissolve, they just pour them in and flush.

Why You Should Use an RV Holding Tank Treatment

  • Elimination of Odor

When it comes to anything toilet/sewage-related, there’s going to be an odor involved. It is a whole different ball game when it comes to an RV. The best way to ensure that the odor does not become overbearing in the RV is to use an effective holding tank treatment. So, using one of these will ensure the tank is fresh and deodorized.

  • It Cleans out the Holding Tank

Thanks to the enzymes and bacteria present in RV holding tank chemicals, the tanks get a good cleaning out. When using these types of products, users do not need to buy separate cleaning and deodorizing products. With a little bit of research here and there, the perfect product can be found. Even better is the fact that the tank will remain healthy and clean.

Types of RV Holding Tank Treatments

  • Liquid RV Tank Holding Treatments

It goes without saying that these treatments come in liquid form. On their own, they require a bit of work. There has to be some measuring and diluting if the need arises. It becomes tedious at times, but there is still upside with them. It is ready to use once it is put in the toilet. They are just as effective as their tablet counterparts, the only daunting aspect is the measurement.

  • Tablet RV Tank Holding Treatments

A handful of RV owners will agree that these are the more natural ones to use. Their main strong point is that they eliminate the need for measuring. Based on this, portion control is not an issue at all. Users just need to drop the assigned number of tablets in and the rest is history. The main set back for most people is that they have to be left to soak and dissolve before being flushed.

  • Chemical RV Tank Holding Treatments

This is a form of a tank holding treatment that many old-time RV users are conversant with. They make use of chemicals such as formaldehyde to keep the odor at bay. It also goes to town on solid waste making it seem like a suitable option on the surface. Apart from being harmful to the environment, this option also kills all bacteria. This includes the bacteria that help break down the waste.

Best RV Holding Tank Treatment FAQ:

Q: What is an RV holding tank treatment?

This is a product which basically ensures the breakdown of waste and/or the elimination of odors in an RVs tank.

Q: How do I use my RV holding tank treatment?

  It is usually quite straightforward, first, drop or pour it in the bowl. This is dependent on the type of treatment being used. After that, it should be flushed and allowed to soak.

Q: How should I clean my RV holding tank?

Once it is emptied, the tank will definitely be in need of some cleaning. RV owners should first fill the tank with freshwater and bleach. After that, the toilet lid should be closed to avoid the inhalation of toxic fumes. After about 10 minutes, the tank should be drained out then filled with some more fresh water. The draining process should be repeated until the water coming out is clear.

Our Top Pick

It has got the fragrance and the strength to contend with any given RV holding tank. What makes it especially efficient is the fact that it comes in a quick-dissolving, portion-controlled form. So all in all, on the front of functionality and ease of use, this product is a winner. This product promises to be the best RV toilet treatment out there. It is packed with ingredients that make it effective for up to a week. This leaves users with one of the best RV holding tank treatment options there is on the market.


  1. How to Unclog an RV Toilet – Wiki How


Load more...