I bought two of these for my grandchildren. Everything is very cool, but put "waterproof" wallpaper NO. The instructions included say the "wallpaper" should be on the outside, but the website says it's on the inside. There is tear-off paper on the wallpaper itself, but nothing to stick on / or in the aquarium. After many tries. finally found the possibility to peel off the substrate (very difficult). Follow the instructions (rub the wallpaper so that it sticks to the back of the tank). OK . The edges were bent so I used masking tape. The kids love it. and I think that's all that matters.
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