Ingredient per shop page: magnesium chloride (the page notes Mg sulfate is not needed in the new method). No max daily dose published.
faunamarincorals.de/en/Balling-Light-Magnesium-Mix-Mg-1kg/14210V
faunamarin.de/wp-content/uploads/2021/04/FM_HTU_Balling_Light_System_EN_NEU_200421.pdf
faunamarin.de/wp-content/uploads/2024/04/HTU-Balling_Light_24_10_23_DE.pdf
lab.faunamarin.de/en/calc-balling-light
faunamarin.de/FM_Katalog_WEB_23.pdf