I used duck water on all my gardens last year & nothing died, quite the opposite, everything thrived!
I moved the first of June, but had started a lot of my plants before I moved, knowing I wanted them in my garden when I got here.
My tomatoes never really did well after the move. In fact, they were dead. I started pouring duck pool water on them just because I had SO MUCH and didn't want to over water my plants, and the duck water brought them back to life! No lie. They went from brown & sickly to putting out tomatoes - In LATE SEPTEMBER/ EARLY OCTOBER!!!!
My greens were greener, my beets bigger & healthier (I know, because I did 3 rounds, the first pre-ducks, the second & third post-ducks, and the difference was incredible.
I used pools with & without drains added, the drain is nice. I didn't glue the drain/hose in, but used a screw device like Amiga said. I also got (late in the season) one of those pump sprayer things that I would fill from the hose in the duck pool & then spray the garden. Worked great, and did wonders.
The first few months I was lugging water & changing pools by the bucket full. That was fine, too. A great work out! I pour/spray AROUND the plants, on the ground, not on the plant itself. But, I change my pools daily in the summer (at least once) and that may account for the lack of nitrogen burn.