Sorry aboute the late reply. Thank you for all the advice. I am going whit the solution of just cleaning the tank up as best I can, but it is in shitty condition, and now one of the fishies seam to be getting sick. I dont know what to do. i dont want to kill the landlord`s fsh, but the pump is to old and hardly work, there is hardly any plants and the tank look ike it have not been cleaned in years.