Ive 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.