It's wonderful how effective and quick this product worked for me! I have an older female Labrador that only goes out the dog door a short distance to urinate and then quickly hobbles back in. The urine flows right into the garden, and the ammonia stench was horrible. The odor could still breach the door and come inside, especially since we have another dog and several cats that use that door. Every time one went in or out, the smell came in. This had gone on for months.
I researched extensively to find a solution, either DIY or purchased, and found this Zeolite. I read that some people didn't like that it resembles cat litter, but I didn't care at this point. The moment I applied it to the soil, the smell stopped! I only applied a thin layer and was amazed at the breathable air! I ordered 2 more bags just to have on hand.
We've had rain, which has interfered with the Zeolite's performance, but after a day of the rain stopping, I just skim off the top drenched layer and sprinkle down another fresh layer. I am VERY PLEASED! It also appears that it doesn't affect my plantings, and I've been using this for about a month now. As long as our old girl is with us, I'll be using this Zeolite!