A- ELEMENTS - Anionic trace element supplement for reef aquariums

Product description

Tropic Marin® A- ELEMENTS contains essential anionic trace elements to support an ideal growth and natural colouration of corals.  

Trace elements are natural minerals, which are needed by the aquarium inhabitants for active biological processes and especially needed by corals and invertebrates for skeletal growth. In seawater there are tiny quantities of these elements, which are consumed in a short time by coral growth and other processes. Regular supplementation of these trace elements is therefore unavoidable.


  • Essential anionic trace elements supplements in a liquid form.
  • Together with Tropic Marin® K+ ELEMENTS, the A- ELEMENTS supplies a complete profile of the essential trace elements with only two solutions.
  • Contains trace elements in a pure mineral form
  • Suitable for an aquarium stocked with soft and leather corals, LPS, SPS and/or crustaceans
  • Supports ideal growth and natural coloration of corals and invertebrates
  • No bleaching of the coral due to lack of trace elements
  • Easy to apply – suitable both for manual dosing and for dosing pumps.


Tropic Marin® A- ELEMENTS contains bromine, fluorine, iodine, lithium, vanadium, molybdenum and selenium in pure mineral form.

Application and dosage

Add 1 ml Tropic Marin® A- ELEMENTS per 25 US-gal./100 l each day. Trace element demand increases with increased aquarium population density. In heavily populated aquariums, dosage may be increased up to the maximum dosage below.

Maximum dosage: Do not exceed a dosage of 2 ml per 25 US-gallons/100 l of aquarium system water volume per day.  

Where calcium is added with Tropic Marin® BIO-CALCIUM the supplementation of trace elements should occur to the amount of the added calcium: 5 ml trace elements to 5 ml BIO-CALCIUM.  

Easy to apply – suitable both for manual dosing and for dosing pumps.

Dosing Calculator

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We recommend the following dosage for your aquarium:
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Other product recommendations

For a complete trace element supply, we recommend the additional use of Tropic Marin® K+ ELEMENTS  (essential cationic trace elements).  

Learn more about natural reef keeping with lowest nutrient concentrations within the Tropic Marin® BIO-ACTIF SYSTEM at www.tropic-marin.com.