Spongebob: Oh No, It's the End of the Bikini Bottom. Mr. Crabs: No Spongebob, It's the WORLD WAR 3!!! Plankton: More than 25 Crackers¿?! Secret Formula is about to get in my hands baby!.
I like the ones that Sink, like at 10:02.. Tieing a rock to the light ones that didn't sink would've been pretty cool too.. Still amazing video, love it! Subbed&Liked
My brother and I did this every year growing up on a lake. Back in the day cherry bombs and TNT were really powerful. And water proof. We would tie them to rocks so they would sink and you would see a big explosion under water. Great memories. Thanks
Cardboard is biodegradable, very much so. A year later that cardboard won't be there. Now as for the sulfur compounds made from these, they may last a bit longer and be a bit more harmful, but even then the earth makes those compounds as well in volcanos and the ocean deals with them.
You could have at least done this in a pool or something not in a lake where living things are, you're contaminating the water and possibly killing the living things in it.