January 07,2021

Bio-Pak: Tough on Odors, Easy on the Planet

As the world becomes more environmentally-conscious, RV dealers must add eco-friendly options to their product lineup. An unfortunate stigma suggests that products must sacrifice effectiveness to be eco-friendly, but that is not the case with Walex’s Bio-Pak. Our company’s research & development staff has extensively tested Bio-Pak’s natural enzyme-based formula to ensure it provides the same benefits as chemical- and biocide-based products. Here are a few reasons Bio-Pak is one of the best-selling holding tank deodorizers.

Enzymes provide natural digestion.

An enzyme is a substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction. Enzyme holding tank treatments accelerate the breakdown of organic material in waste while neutralizing foul odors. They also digest paper and waste to allow for a more efficient and fluid dumping process. One of the most significant benefits of using Bio-Pak is that it eliminates the need for RV toilet paper.

Eco-friendly ingredients comply with emerging legislation…

California is leading the charge to outlaw certain ingredients in holding tank products, but other states might soon follow suit. To comply with these legislation changes, one must switch to a product like Bio-Pak that is biodegradable and free from formaldehyde and biocides.

…and are septic system safe.

RV owners occasionally need to empty their holding tanks into a septic system. But chemical-based products will kill the bacteria that keep a septic system healthy and functioning. If you dump into a septic system, you must use an enzyme-based formula like Bio-Pak.

Powerful formula cleans tank walls and sensors.

Bio-Pak’s advanced enzyme-based formula rapidly digests built-up waste on tank walls and sensors. This residual, caked-on waste is a common source of foul odors that sometimes persist even after dumping the tank. Regular use of Bio-Pak keeps sensors functioning correctly and the holding tank clean and healthy.

Portion control system allows easy, mess-free usage.

Many RV owners love the ease of throwing one quickly-dissolving, water-soluble packet in the tank instead of measuring out a liquid. Each odor-control packet is designed to treat up to a 40-gallon tank.

Customer Reviews

“Excellent product, works great, environmentally sound”


“GREAT environmentally-friendly replacement for harsh, toxic chemicals in my RV black & grey water tanks! I have been very pleased with how this product worked for me—dissolved solid wastes really well, and I had no odors from my tanks at all. In fact, I really think it worked better than the old chemicals I used to put in my tanks. I would have to add a whole bottle (or two) of the blue chemical to my black water tank on every camping trip, but with these enzymes, the most I had to use was two cubes. I like the ease and convenience of dropping in the cubes, the speed with which they “melt” into the toilet water, ease of flushing them down into the tank, and I very much like that there are NO PLASTIC BOTTLES to recycle (or that get tossed into the trash by a lot of people, and end up in our landfills).”

-E. Quinn

“They are like magic!!!”


“Excellent product. I am new to Rv’ing and I was informed to purchase some sort of black water tank chemicals. I looked over numerous reviews and ended up here. I have only used them a few times but so far so good. Believe me when I say these work. I destroyed my toilet at least 5 or 6 times this past weekend and we couldn’t smell a thing. Not too mention it was like 100 degrees out. If these things can tame the combination of my bio-hazard waste and 100 degree temps you’ve got a winner in my book. Too bad I can’t give them 10 stars.”


“No Smelly Potty”


“This is great stuff. Comes in little pods like dishwasher pods. We used one per potty fill up and any smell is nearly non-existent except when opening the potty shaft and it’s not of the debris. Will be using this for the long haul on every vacation where we take our potty.”

-C. Speck

“Gets the “job” done!”


“We use these in a 5 gallon bucket in the “outhouse” on the back of our farm. We use one packet and about 6″ of water. Smells pleasant – not a toilet smell. Dissolves quickly with a little stirring with a stick and last several days (with very little use). A good value and good quality. Shipped quickly and arrived ahead of expected.”


Frequently Asked Questions

Can I empty into a septic system if I use Bio-Pak?

Yes. Bio-Pak is an enzyme-based product, so it is septic safe.

Can I use Bio-Pak in my boat’s toilet?

Yes, you can use Bio-Pak in your boat’s toilet, because the formula is eco-friendly.

Is Bio-Pak scented?

Yes, Bio-Pak is currently available in two fragrances: Alpine Fresh and Tropical Breeze.

How frequently do I need to use Bio-Pak?

Drop a Bio-Pak down your toilet every time you refill your tank with water after dumping or once you start to smell odors emanating from your toilet. How often you do that depends on usage, but typically campers dump about once a week. After you dump, drop one Bio-Pak packet into five gallons of water for a 40-gallon tank. If you have a smaller tank, we recommend 1.25 gallons of water for every 10 gallons of holding tank area. Adding ample water is crucial because it allows waste and paper to fall below the waterline enabling the enzymes to work their magic. 

Does Bio-Pak break down toilet paper as well as waste?

Yes! Bio-Pak’s powerful enzymes digest paper as well as waste. 

Do I need to use special RV toilet paper if I use Bio-Pak?

No. No need for any particular type of RV toilet paper. Bio-Pak will break down and digest top-selling brands just as well.

Can I use this product in my grey holding tank?

No. Bio-Pak was designed explicitly for black holding tanks. For Grey water tank sanitation and odor control, we make a product called Elemonate, designed explicitly formulated to destroy grey tank build-up like organic sludge, grease, and food particles.

How long does it take for the packet to dissolve?

The packet starts dissolving immediately upon contact with water.

Can I use Bio-Pak in a septic tank?

Bio-Pak is septic safe, meaning that if you use Bio-Pak to deodorize your black holding tank, you can safely empty the tank into a septic system. For monthly septic tank treatment, we manufacture Bio-Active Septic Tank treatment, designed to keep septic systems healthy.

What makes Bio-Pak eco-friendly?

Bio-Pak is eco-friendly because it is free from formaldehyde and biocides and septic safe. It uses natural enzymes to digest bacteria, waste, and paper.

Can I use Bio-Pak in any climate?

Bio-Pak should be completely effective in all but the hottest climates. If you’re camping in conditions that exceed 90 degrees for hours at a time, we recommend switching to Porta-Pak.