Here's the review in the link that you sent. It's not real.
I ordered four of these for my 55gallon tank. They are pretty cool, i really didn't know if they were real of not when i bought them but they are fake. Its a great thing for me since i hate the real ones. They always broke up and got into my filter. These ones have i think carbon inside them and the green stuff feels like hair into you get them wet. They look real after your rinse them down. You got to put them in water and squeeze the ball to get all the air out so it doesn't float. Overall i am happy, and will by 4-5 more in the next few weeks.
Animal testing is a terrible idea; they get all nervous and give the wrong answers.