Walex Porta-Pak Holding Tank Deodorizer & Portion Control Drop-Ins - Unbeatable Odor Prevention, Formaldehyde-Free, Non-Staining, Deodorizes & Breaks Down Waste and Paper, Dissolves Quickly - 50 Pack

the best buy for these they work great

works great. just throw one in every time we dump the tank and have no odor problems till the next dump

This was the first rv tank deodorizer I purchased from rv dealer. My local store did not carry this brand. I tried the brands I could purchase locally. They did not work as well as this brand. It eliminates odors better than the other brands.

We have used these in our camper for years and have never had any problems. Great Product.

Easy to use, easy to store, seems to take care of odors really well (boat doesn't smell like heavy chemicals either). Only complaint is several pouches are kind-of stuck together, and they tear easily if you try to separate them. Also, be very cautious handling around water... the wrapper dissolves almost immediately in contact with water. But, very happy with these over using bottles.

good

Have used these for many years now with great success. yearly I sterlize my water tank and lines and use the bleach water to clean out the black and gray tanks, then 1 to 2 pods in the black tank keeps the odors away and helps to degrade the toilet paper.

Best produce I’ve used for smelly tanks!