The blue top left sponge actually looks like its been cut. I cant see the 2215s media being any different to the 2217 and the 2213 which i own. Looks to me like he may have cut a ring out to fill with bio rings. I dont know why he would do this though. The white floss would go at the very top for water polishing. Those other sponges look black? If so theyre carbon and if theyve been used id throw them out as they will no longer be active. If not and theyre sponges, give them a good wash!
Fish die belly upward and rise to the surface. It's their way of falling.