Silbermann Magnesium Chloride (hexahydrate) anhydrous is best suited to increase the magnesium content in the aquarium, also in combination with magnesium sulfate.
Magnesium chloride is suitable for osmosis, fresh and sea water.
Available in resealable can/bucket.
Caution:
Magnesium chloride irritates mucous membranes and eyes.
Keep out of reach of children.
Hazard statements:
H319: Causes serious eye irritation.
Precautionary statements:
P280: Wear protective gloves / eye protection / face protection.
P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove any contact lenses if possible. Continue rinsing.