Prime Day deals end tonight! View Deals
Search  for anything...

BestAir 3BT-PDQ-6 Original BT Humidifier Bacteriostatic Water Treatment, 32 fl oz, Single Pack

  • Based on 6,143 reviews
Condition: New
Checking for the best price...
$9.94 Why this price?
Prime Day Deal · 93% off was $139.99

Buy Now, Pay Later


As low as $2 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Sunday, Jun 28
Order within 3 hours and 48 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Size: Single Pack


Features

  • Durable product
  • This product meets the customer requirements
  • Manufactured in China

Description

The BEST-AIR-3BT is a bacteriostatic water treatment product that helps to inhibit the growth of bacteria, mildew, and mold from growing on your humidifier filter. Used with evaporating humidifiers, not vaporizers, this product will reduce the bacterial growth on your filter and allow your machine to produce fresher smelling air. Without treatment humidifiers can become a breeding ground of mildew, algae, and mold growth with contributes to unusual odor and potentially harmful contaminant distribution. Protecting your filters also affords increased efficiency and filter life. Order your BestAir Humidifier Bacteriostatic Water Treatment today!

Brand: BestAir


Special Feature: Helps control Bacterial & algae build up. Eliminates unpleasant odors. Improves the effectiveness of your humidifier and wick, maximizing the humidity released into the air. Reduces odors casued by bacteria growth See more


Color: Green


Capacity: 32 Fluid Ounces


Operation Mode: Evaporative


Other Special Features of the Product: Helps control Bacterial & algae build up. Eliminates unpleasant odors. Improves the effectiveness of your humidifier and wick, maximizing the humidity released into the air. Reduces odors casued by bacteria growth


Capacity: 32 Fluid Ounces


Operation Mode: Evaporative


Room Type: Bedroom, Living Room, Office


Power Source: Corded Electric


Filter Type: Wick


Item Dimensions D x W x H: 2.38"D x 4.5"W x 10.13"H


Item Weight: 2.3 Pounds


Color: Green


Material: Genuine Parts


Brand Name: BestAir


Model Name: 3BT-PDQ-6


Model Number: 3BT-PDQ-6


Included Components: water treatment


UPC: 885537742407 078757003308 885136344132 885947599356


Warranty Description: N/a.


Global Trade Identification Number: 08


Manufacturer: BestAir


Part Number: 3BT-PDQ-6


Item Type Name: BestAir 3BT-PDQ-6 Original BT Humidifier Bacteriostatic Water Treatment, 32 fl oz, Single Pack


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jun 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Excellent product
Size: Single Pack
Bought the three pack for our work humidifier and saw that it completely eliminated mold/mildew/bacteria in the water and on the filter. I bought a bottle for my home humidifier. It works great. Very satisfied with this purchase.
Reviewed in the United States on December 19, 2025 by Jim Dickinson

  • Buy this...don't waste time with anything else. Must have if you use a humidifier Buy this...don't waste time with anything else. Must have if you use a humidifier
Size: Single Pack
This stuff actually works. I was having trouble with constantly having to clean my Vicks cool mist humidifier...it would get scummy and the wicking filter would turn brownish and crusty. I used the drop in tank cleaning cartridges that were recommended by the manufacturer and they worked for maybe two weeks (the month of sanitizing action that was claimed was stretching it IMHO)...that's just not good enough for me considering their price. I run my humidifiers CONSTANTLY in the winter and I was getting tired of replacing wicking filters and having to totally clean out the tray under the tank on a weekly basis - I'm a busy girl on a budget. Read the reviews for this product and decided to give it a try. It really works. I add 5ml to the tank each time I fill it up (once a day) and I see NO MORE SCUM/BIOFILMS forming in any part of the tray, on the filter, or in the tank. No discoloration. I wish I had a before picture but attached is how my wicking filter looks after AT LEAST a month of constant use...clean and moist. Before using this product after the same amount of time I would see discoloration always in the filter. Also I was pleased to see the large size of the bottle. I always expect to receive bottles of product that are much smaller than I had expected. This will last a long time - easily one winter and then some. I keep it right under the sink where I fill the tank along with a 5ml syringe ( I work in a lab). Easy peasy. Don't waste time with anything else. ps. I don't write reviews..so this product really impressed me ... show more
Reviewed in the United States on February 11, 2015 Reviewed in the United States on February 11, 2015 by Fayfay

  • Keeps My Humidifier Fresh and Clean Keeps My Humidifier Fresh and Clean
Size: Single Pack
This stuff really helps keep my humidifier from smelling funky. I just add a little each time I fill it, and it wroks well to stop any build-up or slime. The bactireostatic formula seems to do what it’s supposed to, and my water stays fresher longer. Just check out the image. I haven't seen it clean like this in a while. Only reason I gave 4 stars instead of 5 is because I wish the bottle had a smaller spout for easier pouring. Still, it’s been great overall andhelps my humidifier clean and run smoothly without much effort. Must add for a kids room to keep them healthy! ... show more
Reviewed in the United States on November 3, 2025 Reviewed in the United States on November 3, 2025 by Brandon

  • Love.
Size: Single Pack
Purchased to help keep my humidifier cleaner, it's helped cut down on the pink mold we get that just happens. It is not a cure-all, still needs washed but this allowed me to extend it until the weekend vs twice a week. Bottle doesn't leak, it's easy to handle and has no smell, which was wonderful.
Reviewed in the United States on May 11, 2026 by Jennifer W.

  • Great item
Size: Single Pack
Great value
Reviewed in the United States on May 25, 2026 by Dark and Lovely Di

  • no intent to defraud America but hmmm on the sizes?
Size: Single Pack
First off all this about blue label and intent to defraud us. Amazon is NOT the fraud police nor the instigator of class action lawsuits as part of Prime memberships :) And above all we must be kind and remember that none of us are perfect - even (and especially) company bigwig hoohahs. Sometimes a mistake is made and probably not with evil intent. MAYBE the blue label stated the amount needed in a wrong or confusing manner, or maybe people read it incorrectly. That said I cannot SEE the bottle labels to know; perhaps one of the conspiracy theorists would take a peek. And, the Wally Worlds (Walmart) in my zip code have NONE of ANY for sale much less one for !!!!!$4!!!!! as one comment stated. So please do this writer the favor of carefully reading the labels and to know how big the tank is you are filling because I care about your health more than I care about a couple dollars. My label says ONE CAP PER GALLON. Humidifiers come in all sorts of sizes so a measure per gallon makes the most sense. Also note that there are 3 products in this particular line now - see how the label changed to show the 123. I am certain they had to change the labels to include all the products and t make sure all things are correct and NOT misleading. If someone is putting 1 cap into each 2.5 gallon side of a 5 gallon humidifier like mine, then they might actually get sick from contamination when they thought they were preventing it and thus be mad and sue the socks off someone. I'd rather have the correct amount not a diluted one so I am happy to put 3 caps per side in my 2.5 gallon tanks. THOSE CAPS ARE TINY!!!!! I am not sure I could correctly make a 1/2 cap so I use a full one :) Secondly, my first review was for a $9.99 single 32 oz. WHITE LABEL :) bottle. I thought it was a fair price, having just bought the humidifier it seemed reasonable to me. I use 6 caps each time I fill'er up. I have allergies to mold so it is an investment in my health. The other day I actually ran out and trying to get some fast, I was discouraged because Wally World here didn't have any at all in the store or available to pick up later at the store, and their merchants were pirating. So using my cell on Amazon while wandering Wally World desperately seeking bacteria killer I saw in my search results: " BestAir 3BT Original Humidifier Bacteriostatic Water Treatment 96 oz. 3 Pack" so I ordered it - I liked the idea of paying $25 for 3 large 96 bottles (or even 3 of the 32 oz.). I figured waiting 2 days would be OK to run the Air Care with just plain water for 1.5 days - my dog hacks all night without running it, the Air Care truly has been a cure for both our winter coughs. Anyway....what I ended up getting delivered was TWO times 52 oz. bottles - NOT 3 times 96 oz. bottles. But now I see that it was "probably supposed to be " 3 bottles of the 32 oz size - I guess - so why I got 2 of the 52 oz is not for me to say. My seller was "Jackson's Hardware" which was the next seller up to bat on the order (we can always choose our seller or go with the automatically selected next one in line). In my case the order was fulfilled by Amazon - they pack and ship from seller inventory held at its huge warehouses. But still the label had the correct title, and I didn't lose anything, it is just odd. I took a couple pictures in case you think I am daft, which you might think anyways based on all my verbiage ;) I am so entertained by writing! ORIGINAL REVIEW: reasonable price, it uses 1 (very) small capful per gallon and for my unit it is about every 4-5 days. ... show more
Reviewed in the United States on April 25, 2018 by Tracy

  • So when all is said and done, this product still works the best.
Size: Single Pack
I've been using this product for about five to six months of every heating season since I purchased my two-tank Vornado Evaporative Humidifier with two wick filters approx 10 years ago after another type died within the first few weeks of use. In that time I have never had any unpleasant odors or sign of algae or mold while using it. I also use a Holmes water treatment product to control mineral buildup. I did try a product from BestAir for its claims to also control mineral buildup on the wick filters. Unfortunately, it made my humidifier maintenance chores worse instead of better---I went through much more vinegar dissolving the hard yellowish-buildup than I usually do. As for measuring & dispensing, since the cap on this Original BT Humidifier Bacteriostatic Water Treatment has been made sooo very much smaller, and the cap on the Holmes product I bought in bulk years ago is also very small, this year I've been dispensing them using one of these droppers katito White 3ML Disposable Plastic Eye Dropper Set Transfer Graduated Pipettes (20 PCS), after I measured how many of each it would take for the requisite amount in each 2.1 gallon tank, and this has been the best year so far for mineral buildup. The warnings on some of the other products really do give one pause, but I'll probably never forget the few months last winter that I tried what proved to be more-odoriferous-than-I-can-stand tea tree oil instead of this product since I'm reminded at the kitchen sink every time the odor floats out of the empty tanks during refilling. So I suppose it has permanently embedded itself in the tanks' plastic. So when all is said and done, this product still works the best. ... show more
Reviewed in the United States on February 20, 2017 by Athena

  • Good
Size: Single Pack
Keeps the slime from building and doesn’t give off an odder
Reviewed in the United States on April 17, 2026 by michael kottre

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...