Cobalt
Cobalt
Cobalt (Co) atomic number 27, PJS considers it to be a Trace element as it plays a crucial role in the biological and metabolic process in corals and is used by all reef organisms and is measured by ppt in seawater. Cobalt belongs in the transition metal group, along with molybdenum, nickel, zinc, copper, iron, rubidium and ALL are naturally found in seawater, maintaining proper cobalt levels is important for biological processes, coral color, vitality and healthy coral growth, and supplementation will be necessary, especially in heavily stocked tanks.
Cobalt Key Roles
Photosynthesis / Zooxanthellae:
Utilized in the symbiotic relationship of photosynthesis for corals.
Utilized by zooxanthellae for photosynthesis to harvest the energy from light
Biological / Metabolism:
Cobalt is essential for metabolic processes and enzyme production. It is used by zooxanthellae in chlorophyl production for photosynthesis. Cobalt is required for conversion and production of nutrients and proteins to process for living things for growth , tissue repair, digestion, reproduction and must be maintained with all other within this group.
Cobalt is metabolized by corals and by all organisms in the entire ecosystem including denitrification and pigment production.
Enhanced Coral Coloration:
Cobalt promotes and enhances the vivid coloration and intensity of corals.
Aids in UV protection for corals and zooxanthellae.
Protection Against Parasites:
Cobalt supports the overall health, reducing stress and promoting resistance to parasites.
Cobalt Levels
Natural Seawater Levels:
Cobalt levels in natural seawater typically .000005 mg/L or 5 parts per trillion (ppt).
Target Aquarium Levels:
Many reef aquarists maintain cobalt levels near this natural range.
PJS recommends aim for a cobalt concentration of .001-.002 mg/L. This is a very small range!
Consumption Rate:
Medium, but steady
Cobalt Testing
ALWAYS test cobalt levels in your reef aquarium before supplementing to determine if dosing is needed to avoid overdosing.
Testing:
Regularly test cobalt levels using a reliable test kit or by sending water samples for ICP testing
Cobalt Dosing
Start slowly by beginning with a low, gradual dose over days avoiding any sudden shifts in water chemistry and monitor the effects.
Methods:
Cobalt can be dosed via liquid additives.
Consider Advanced Methods:
Dosing stock solutions with pumps and continuous drip systems can be used to maintain precise cobalt levels.
Considerations
Avoid overdosing, as it can lead to imbalances and become toxic to corals and everything in your tank. Overdosing will cause corals to darken and algal blooms, including cyano outbreaks. Cobalt is essential for many metabolic processes and enzyme production. Cobalt is used by all living organisms, aiding in a balanced eco system. Cobalt is highly recommended for high PAR lighting. Cobalt is an essential part of vitamin B12. Foods may contain levels of cobalt that can influence your parameters. Dosing cobalt, more is not the answer, time is the answer. Cobalt is essential for the proper care of sponges an macroalgae. Dosing cobalt can influence consumption of iodine, iron, calcium and many other elements. Deficiency will lead to reduced and improper growth, sensitivity to lights, imped the ability to produce or consume nutrients, impacting the symbiotic relationship of corals and zooxanthellae. Overdosing can invite dinoflagellate population growth.