I've been pouring 7 different metals into a 24" tall aquarium over the weekend, and the results have been super cool! I poured metals with different melting points to see if they had any different effects when they came in contact with water. From Pewter (350f/170c) all the way to Thermite (4000f/2204c). Some of them exploded, some of them sank and made molten metal drippy-castles, but they were all interesting. Here is a list of metals I used, and their melting points: Pewter 338–446 °F - 170–230 °C Tin - 449.5°F (231.9°C) Bismuth - 520.6°F (271.4°C) Lead - 621.5°F (327.5°C) Zinc - 787.2°F (419.5°C) Aluminum - 1,221°F (660.3°C) Iron - 2,800°F (1,538°C) 4000f (2200 C) Reaction I poured in the metals as soon as they were fully liquid, so they could not raise too far above the melting point and skew the results. This video is a great demonstration of the leidenfrost effect.