Tropic Marin Pro-Coral A- Elements Contains no phosphates, chelates &amp; other unnatural solvents Adds vanadium, molybdenum, selenium, fluorine, bromine, iodine, &amp; lithium to your aquarium Carefully formulated to support the healthy &amp; continuous growth in your reef aquarium Replenishes all the essential anionic trace elements used by corals, invertebrates &amp; algae