Walex Elemonate Grey Water Tank Deodorizer & Freshener - Freshens Sink & Drain Lines, Rapid Dissolving Drop-In Tablets, Ideal for RV's, Boats & Homes, Easy to Use - Fresh Lemon Scent, 5 Pack

Just like the other Walex products, this one’s a must-have. Super easy to use and keeps the grey tank smelling fresh and clean. If you’re running a travel trailer or RV, it’s one of those “better safe than sorry” items you’ll be glad you packed. Handy and effective!

I found this one to work best after trying several others. Keeps smell down to pretty much nothing in the camper van. Recommend!

Dissolves quickly. Leaves a nice fresh scent. Not sure if it treats the tank for longer term. Just started using it.

I love these. They quickly dissolve easily in the kitchen sink of my camper. They work well and the size is ok. I love the lemony smell too. Great value for the money.

This is the only brand I will use in my RV's gray water tank. Without regular treatment my kitchen sink would stink since I'm not as careful as I should be. Coffee should be disposed of outside or in the black water tank..not the kitchen sink drain.

These are essential for your travel trailer or recreation vehicle. Easy to use pods and very good value for the money. They really work to keep the odor in check and bacteria down

I have had rv's for the better part. 30 years. This item, what's the best so far? And dissolves fast.

I have been using Walex Elemonate (Fresh Lemon Scent) for several years in an RV with Gray water holding tank. I have never had any odor problems when consistently using Elemonate. It is easy to use.But one recent problem that I discovered is that Elemonate doesn't totally dissolve. It seems to have a small amount of silica like material that must be there as part of the reaction needed to dissolve grease and organic sludge. We have a large particle strainer in the sink. So it is unlikely that we are the source of the undissolved particles. After several years of using Elemonate there is enough of the silica like material that has collected that my waste pump shut down. I used a non pump method to clear the tank and then used a rotating spray head (purchased from Amazon) in the chamber to clear out the silica like material. Now the waste water pump works just fine. I dissolved one of the Elemonate tablets in water until all that remained was a fine silica like material. So depending on the setup of your RV Waste system Elemonate may work great or it may lead to extra work down the road.