Essential Elements Marine, 16 oz by Kent Marine

Kent Marine Essential Elements replaces biologically important trace minerals which are removed by marine fish and invertebrates, and removed through protein skimming, ozone, and especially carbon filtration.
Designed for fish only and reef systems. Essential Elements is unmatched in its ability to increase vigor and color!
Does not contain detrimental heavy metals, phosphates, nitrates, or silicates. Does not promote undesirable algae growth.

Directions:
Add 1 teaspoon (1 capful or 5 ml) per 50 gallons every 1 to 2 weeks, depending on the amount of water changes done.

Contents:
Inorganic mineral salts of aluminum, boron, bromine, calcium, chromium, cobalt, copper, iodine, iron, lithium, magnesium, manganese, molybdenum, nickel, potassium, selenium, sulfur, strontium, tin, vanadium, and zinc in a base containing deionized water and EDTA.