it's the Yellow Prussiate of Soda as an anti-caking agent added to table salt you really don't want. Iodized salt itself is fine to use. I've used iodine to treat fish as a topical antispetic for years on injurys with no illeffects and excelent results. Most salt tolerant/brackish and African cichlids consume algae either directly or via prey with high to moderate concentration of iodine. The color of the brackish/marine cf. Cichlasoma urophthalmus has a different coloration than the freshwater species with more of a orange/rust color of iodine (observation only) but would seem a logical conclusion. I'm interested to see if they are eventually slpit into sub-species.
