I think the first pic is of feather dusters which are worms. I was going to recommend not switching out the LR, but it seems you've already done so. Your tank is super new so I think your anemone will probably not make it. Have you tested your ammonia, nitrites, and nitrates? I think you're headed for a spiral downwards since your tank is so new and the bacteria is just establishing and prob. cannot withstand the bio load you are putting in it. Plus the anemone and starfish are sensitive to even low levels of nitrate and swings in parameters. Personally, I like it w/out the bubble wall and fake plants, gives it more of a natural look. Powerheads are what are used for aeration and movement.