The Formul8x series of engineered seawater pre-mix formulations yield economy and precision, two characteristics which are typically mutually-exclusive in engineered seawater salt blends.  All Formul8x formulations require that the user supply their own sodium chloride meeting the following requirements: ≥99.5% purity; free of additives.  In North America, three commonly available examples are: Morton Purex (not TFC Purex); Cargill Hi-Grade Granulated; U.S. Salt Superior General Purpose.  These products meet Food Chemical Codex (FCC) standards, and are available from regional suppliers in pallet quantities of 49 bags (50 lbs. each).

​

​Astute observers will notice that the minor and trace elements incorporated into this and the other Formul8 and Formul8x formulations are those which are specifically demonstrated by oceanographic researchers to exhibit nutrient-type depth profiles, and which are not considered phytotoxic at NSW values; this list conforms with our minor and trace element solution, Isol8 MT, which is intended to be dosed into recirculating seawater systems as a means of maintaining NSW values, at the daily rate of 1 mL / 250 gallons, or 1 drop (0.05 mL) per 12.5 gallons.

​

Lanthanide metals (Lanthanum, Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, and Lutetium) are not incorporated into these formulations; this decision has been made as a result of the massive body of evidence which shows that these elements, collectively, are phytotoxic in concentrations which are at or below those of their respective NSW values (assuming S=35.0).  Additionally, barium, fluorine, and chromium salts are excluded on grounds of contact toxicity.