Red Sea Salt is designed to provide the exact parameters of tropical reef water with a slightly elevated alkalinity as needed in a closed marine system. Red Sea salt is ideal for fish and invertebrate systems or for low-nutrient tanks where the hobbyist supplements all of the individual elements on a regular basis. All-natural Eco-friendly harvesting from the waters of the exotic Red Sea. Biologically balanced levels of foundation elements. Full complement of trace elements. Guaranteed parameters for 10 liter / 2.5 gal mix. No nitrates or phosphates (algae nutrients). No toxic levels of Heavy Metals. No chemical binders. Low moisture content. Red Sea Salt will produce stable seawater with a pH of 8.2 u 8.5. Parameters are based on dry salt mixed with RO water.