What trace elements are needed for keeping clownfish?

To keep marine fish, of course you need "seawater," and natural seawater is certainly the most suitable for keeping them, but due to environmental pollution, using seawater drawn from the seaside is not the most appropriate approach; instead, seawater should be drawn from the deep ocean far offshore, and this seawater drawn from the ocean must undergo many processing steps before it can be used. First, the container holding the seawater must never be a metal container, because the metal ions will dissolve into the water and harm the health of the aquatic life. Second, it must be sealed and stored in a place not exposed to sunlight; after about one month, filter out the dirt that has settled at the bottom of the container, and only after irradiation with an ultraviolet sterilizing lamp can it be put into the aquarium. Not everyone can carry out these steps, and in inland areas this is even more of a problem; therefore, using "artificial seawater" is the most convenient method. Thanks to long-term research abroad, "artificial seawater" that is closest to natural seawater has already been produced; simply dissolve it in tap water at a certain ratio according to the instructions on the packaging. The best artificial seawater should contain all the "major elements" (MAJORELEMENTS), "minor elements" (MINORELEMENTS) and "trace elements" (TRACEELEMENT) found in natural seawater. The major elements include sodium, magnesium, calcium, potassium, sulfur, chlorine, etc.; the minor elements include bismuth, carbides, silicon, iodine, lithium, fluorine, molybdenum, strontium and phosphorus, etc.; these elements can help marine organisms live longer and healthier, and maintain the colors they originally had in the natural ocean, and are greatly beneficial for preventing disease and increasing opportunities for reproduction, etc. And the nearly seventy kinds of trace elements are of great help to the metabolism of marine organisms and to water quality.