API Marine Magnesium 16oz Test Kit It is also safe for

It is also safe for use with reefs and corals

ion exchange resins) during use

Promotes nitrification

Fully submersible electronic aquarium heater PRE-SET at 77°F (25°C)

API Marine Magnesium 16oz Test Kit It is also safe forAPI MARINE MAGNESIUM raises and restores magnesium levels in your reef aquarium, and should be used whenever magnesium deficiency is present in your water. The magnesium level of a reef aquarium should be between 1,250 1,450 ppm. Use API MARINE MAGNESIUM when water tests show a magnesium level below 1,250 ppm mg L in your reef aquarium. Dose according to directions on product label. Treats up to 948 US gallons of salt water. With API Aquarium