My sister got two turtles a while back, and it was great at first. Though now it seems it's too much for her to properly take care of them. Their tank is very dirty, though she claims they like that. A quick google-search suggested she doesn't know what she's talking about. Though to be sure I wanted to ask here, since I don't know how bad it is.
Here are some photo's:
This used to be a white dinosaur skeleton. There were also only little pebbles at the bottom, so the sand-like stuff you see are (I guess) turtle-droppings and sunken food. Also, the filter you see doesn't work any more. There's no water flowing through it any more, I guess it's clogged up.
Please advice me, because if it's as bad as I think I'm taking action. Then the turtles will be given away to someone who does take proper care of them.
Thanks a lot!