WATER Elements and Trace Elements
Calcium (Ca)NSW level- 380-400ppm Aquarium level- 400-450ppm (aim for a stable and balanced level within this range). Too little
Magnesium (Mg)NSW level- 1290ppm
Aquarium level- 1200-1380ppm (aim for a balanced & stable level)
Iron (Fe)NSW level- 0.003-0.1ppm
Aquarium level- Iron depletes rather fast so a constant but small dosage is recommended.
Levels of up to 5 times that of Natural Sea Water can be maintained if your aquarium is using the element.Too little
Iodine (I)NSW level- 0.064ppm
Aquarium level- Commercially available test kits for iodine can be tricky due to the chemical having a few forms and bonds to other elements but they do well enough to keep your aquarium as close to natural seawater levels as possible.Too little
Bromine (Br)NSW level- 67.3ppm
Aquarium level- 65-68ppm but levels must be kept at the higher end of this range for corals to be able to use the element, but low levels don’t appear to have a dramatic effect on corals.
Dosing is best done in very small but regular amounts and tested via ICP-OES occasionally to be sure of your dose rates.Too little
Strontium (Sr)NSW level- 8-9ppm
Aquarium level- 8-10ppm
Chromium (Cr)NSW level- 0.0002ppm
Zinc (Zn)NSW level- 0.005ppm
Aquarium level- Zinc is used to regulate Zooxanthellae in SPS coral, it thins the Zoox out and allows the coloured pigments to be seen underneath.
A quality supplement and occasional ICP-OES testing will ensure that you have this element covered.Too little
Potassium (K)NSW level- 380-450ppm.
Boron (B)NSW level 4.3ppm
Aquarium level 6-8ppm
Manganese (Mn)NSW level- 0.0004ppm Aquarium level
Cobalt (Co)NSW level- 0.00039
Fluoride (F)NSW level- 1.3ppm Aquarium level
Nickel (Ni)NSW level- 0.0066
Copper (Cu)NSW level- 0.003ppm
Information provided by:Shane Coleman