Walex Bio-Pak Holding Tank Deodorizer Review

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Walex. Bio-Pak against a dark blue background.

There are many exciting things about owning an RV. Sadly, waste holding tank maintenance isn’t one of them. RV holding tanks can have a strong odor and can be a messy endeavor. Thankfully, Walex Bio-Pak makes this task a bit less daunting. 

Why Would You Need a Holding Tank Deodorizer?

It likely comes as no surprise that holding tanks can quickly develop an odor. What many often don’t realize is that odors aren’t limited to the black tank. Some RVers claim that gray tanks holding kitchen wastewater can smell equally as bad as their black tanks. In addition, if left untreated, smells can make their way into an RV’s living space. Thankfully, tank deodorizers are helpful in both situations.

Tank deodorizers do more than just handle holding tank odors. This product can also help break down waste and toilet paper in the black tank. Black tank build-up is never good and can lead to many problems. Having a product to break down the contents helps prevent clogs in addition to smells. 

Walex Bio-Pak Holding Tank Deodorizer Overview

Walex Bio-Pak RV Marine Natural Enzyme Black Holding Tank Deodorizer Drop-Ins, Camper, Boat, Camping Cassette Toilet Pods, Alpine Fresh, 10 Pack
  • NATURAL WASTE BREAKDOWN - Swiftly breaks down waste and stubborn toilet paper, keeping your holding tank sensors working...
  • ENZYME HOLDING TANK DEODORIZER - Bio-Pak marine and RV holding tank deodorizer tabs contain powerful enzymes that...

Walex Bio-Pak is a pre-portioned holding tank deodorizer. It works to reduce odors from both the gray and black tanks. These pods help prevent odors from drifting back up into the RV. Additionally, it breaks down holding tank contents to keep your RV holding tanks functioning correctly. 

Each pre-portioned packet works on holding tanks up to 40 gallons. The pod dissolves in the tank with no further action needed from the RVer. 

Walex Bio-Paks are also septic safe. These pods are great for RV owners who utilize their residential septic to empty their RV waste tanks. Using these packs won’t disrupt the natural breakdown process of your septic. 

Our Favorite Features

While there are many great products on the market for holding tanks, we think Walex Bio-Pak is an excellent choice. Let’s see what it can do. 

Easy to Use

These pre-portioned packs make it easy to know you’re using the correct amount. Simply place a pod in the tank with a generous amount of water, and it will get to work. There is minimal effort required. Keep in mind that you should use one pack for every 40 gallons. 

Liquifies All Toilet Paper

Toilet paper is a hot topic with RVers. Many RVers swear you must use special RV toilet paper. Unfortunately, RV-specific toilet paper comes at a high cost. Many feel it’s acceptable to use standard toilet paper. Unfortunately, that can lead to clogs if not used appropriately. Walex Bio-Pak helps to liquify all toilet paper and prevent clogs. 

Formaldehyde and Biocide Free

It’s always good to reduce the number of harmful chemicals used in your RV. It may not seem like a big deal to use these chemicals in holding tanks, but they can disrupt the breakdown process. The Walex Bio-Paks are formaldehyde- and biocide-free to reduce harmful chemicals in your RV system. 

Pro Tip: You don’t need to use expensive RV toilet paper. Check out these RV Toilet Paper Alternatives You’ll Wish You Used Sooner.


There are a few cons regarding Walex Bio-Paks that you should take into consideration. First, these packs are pre-portioned for 40 gallons, making it difficult to use if you have significantly smaller or larger tanks. Those with smaller tanks will need to choose another product. 

This product also requires dry hands to use. If your hands are wet at all, the packet will instantly begin to dissolve, leaving you with a mess to clean up. 

Alternatives to the Walex Bio-Pak Deodorizer

If a Walex Bio-Pak isn’t the product for your specific situation, we have a few other options that might be right for you. Here are our top Walex Bio-Pak alternatives. 

Happy Campers Holding Tank Treatment

Happy Campers RV Toilet Treatment - 64 Black or Gray Holding Tank Deodorizer Treatments for RVs
  • ODOR FREE: Eliminates odors in the RV holding tank. Absolutely no chemical or sewer smell.
  • Septic tank friendly

Happy Campers Holding Tank Treatment is a loose powder product. It’s an excellent choice for RVers wanting to adjust usage based on tank size. Happy Campers Holding Tank Treatment is a superb option for RVers with either tiny tanks that would be overwhelmed by the Walex Bio-Paks or those with large tanks that require more than a single pod. 

Happy Campers works similarly to many other holding tank cleaning products. It helps eliminate odors and breaks down waste in your RV’s tanks. Using Happy Campers in both black and gray tanks can help both tanks smell fresh. 

TankTechsRx Treatment

TankTechsRx - RV Holding Tank Treatment & Cleaner - 16oz = 32 Treatments - All Natural probiotics for RV, Marine, Camping, Portable Toilets
  • TankTechs Rx uses less to do more so it costs less per tank treatment.
  • Just ½ oz treatment will multiply to accommodate any tank because it is alive!

TankTechsRx Treatment is a liquid holding tank cleaner and deodorizer. This product is an excellent option for those wanting to measure precisely how much product they use in their tank versus a pre-portioned pack. Using just half of an ounce is enough to treat most tanks. This product is also helpful for those who have non-standard-sized tanks. 

TankTechsRx treatment works in the same way as many other holding tank options. However, this liquid holding tank cleaner reduces the sludge in tanks as well as eliminating odors. TankTechsRx works on both black and gray tanks. 

No one likes dealing with their RV holding tanks. Delaying the task will only make the situation worse. What tips do you have for reducing smells from your wastewater holding tanks?

Last update on 2024-07-18 / Affiliate links / Images from Amazon Product Advertising API

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