SeaTrace does not harm filtration bacteria SeaTrace now includes Molybdenum for increased filtration bacteria stability Elements included in SeaTrace: Aluminium, Antimony, Arsenic, Barium, Bismuth, Cadmium, Caesium, Cerium, Chromium, Cobolt, Copper, Fluorine, Gallium, Germanium, Gold, Indium, Iron, Lead, Lithium, Manganese, Molybdenum, Nickel, Niobium, Palladium, Radium, Rubidium, Scandium, Selenium, Silicon, Silver, Thorium, Tin, Titanium, Vanadium, Yttrium and Zinc. Contents: 250ml See bottle / box leaflet for further instructions.