Heavy metals is improved with the addition of thorium. Tellurium is added to copper and steel alloys to improve their machinability; and to lead to make it harder and more acid-resistant. The biocidal effects of some heavy metals have been known since antiquity. Platinum, osmium, copper, ruthenium, and other heavy metals, including arsenic, are used in anti-cancer treatments, or have shown potential. Antimony (anti-protozoal), bismuth (anti-ulcer), gold (anti-arthritic), and iron (anti-malarial) are also important in medicine. Copper, zinc, silver, gold, or mercury are used in antiseptic formulations; small amounts of some heavy metals are used to control algal growth in, for example,
I Was the King, I Really Was the King Greenhouse" and "East St O'Neill" as standout tracks, and ended his review with a short summation of the album's overall sound; "Horns parp convincingly, guitars swagger rather than stagger, choruses seem to have some idea of where they want to be in 30 seconds' time and Animals That Swim emerge as – gasp! – actual, potential pop stars". I Was the King, I Really Was the King I Was the King, I Really Was the King is the second album by British alternative rock band Animals That Swim, released in June 1996 via Elemental Records. Its title is taken from