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Pharmaceutically pure sea salt with prebiotic bacterial nutrition


Bio-Actif Sea Salt


Product description

The unique Tropic Marin® Bio-Actif sea salt contains naturally occurring marine biopolymers, which support the microbiological conditions in an aquarium and thus protect and enhance the growth of aquarium fauna.  

To this end, corals will exhibit their bright and vibrant colors in a natural way, while skeletal growth and/or the growth of stronger tissues are promoted. The reserves built up in this manner ensure that corals are more robust and less sensitive than otherwise. Fish also benefit from the bio-active substances by the formation of effective protection against damage to mucous membranes. Fish will exhibit their heightened sense of well-being by increased mating and reproduction activity.  

Tropic Marin® Bio-Actif sea salt is suitable for both beginners and advanced aquarists, and ensures stable conditions for all marine organisms at an alkalinity in the range of 8-9 °dH.

Our Sea Salts in comparison

Product description

  • Tropic Marin® Bio-Actif is particularly well suited to reef aquariums

  • Contains all major, minor and trace elements of tropical seawater in natural proportions. Optimal calcium and magnesium concentrations for reef aquariums + prebiotic bacterial food

  • Ideal pH value and buffering

  • Prebiotic bacterial food promotes low-nutrient conditions and the vivid colours of LPS and SPS corals. The microbiology in the aquarium is stabilized and the water quality increases

  • Optimal solubility of all 70 trace elements and stabilisation of these through bioactive substances

  • Can be used permanently and is ideal for setting up a new tank, for new stocking and for any stock expansion

  • Tropic Marin® Bio-Actif is the ideal basis for the care of even the most sensitive fish, corals, invertebrates and marine algae in modern reef aquariums


Anwendung & Dosierung

Contains all major and trace elements as well as bio-active substances native to tropical sea-water contained in a natural formula.

Major Elements:

Calcium; Chlorine; Magnesium; Potassium; Sodium; Sulfur.

Trace Elements:

Aluminium; Antimony; Arsenic; Barium; Beryllium; Bismuth; Boron; Bromine; Cadmium; Caesium; Carbon; Cerium; Chromium; Cobalt; Copper; Dysprosium; Erbium; Europium; Fluorine; Gadolinium; Gallium; Germanium; Gold; Hafnium; Holmium; Indium; Iodine; Iridium; Iron; Lanthanum; Lead; Lithium; Lutetium; Manganese; Mercury; Molybdenum; Neodymium; Nickel; Niobium; Nitrogen; Osmium; Palladium; Platinum; Praseodymium; Rhenium; Rhodium; Rubidium; Ruthenium; Samarium; Scandium; Selenium; Silicon; Silver; Strontium; Tantalum; Tellurium; Terbium; Thallium; Thorium; Thulium; Tin; Titanium; Tungsten; Vanadium; Ytterbium; Yttrium; Zinc; Zirconium.

Application & Dosage

To achieve a salinity level of 32–35‰ (psu), dissolve 35 ml (approx. 37–40 g / 1.3–1.4 oz.) of Tropic Marin® Bio-Actif for every litre or 0.5 cup (approx.140-150 g) for every US-gallon of water in a container. The specific gravity of the sea salt solution should be 1.025 to 1.027 at a temperature of 25 °C / 77 °F. The prepared saltwater can be used as soon as the salt is fully dissolved.

Note: When checking the conductivity of freshly prepared Tropic Marin® Bio-Actif saltwater the conductometer will show ca. 10% low results, because the contained organic substances affect the measurement. We recommend measuring the specific gravity with the Tropic Marin® Hydrometer. Slight cloudiness is normal at this stage and indicates that the bioactive substances are taking effect. Changing up to 10% of the water every week using Tropic Marin® Bio-Actif helps to keep the water quality within the parameters most important to the delicate marine life in your aquarium.

Dosing calculator

Other product recommendations

The very accurate, straightforward Tropic Marin® water tests KH/Alkalinity or KH/Alkalinity Professional and the Calcium/Magnesium-Test Professional are suited for checking the quality of the water and the essential parameters.
For the daily supply of calcium and alkalinity, we recommend Tropic Marin® Carbo-Calcium or rather All-For-Reef or the application of the well-known Balling method with the Tropic Marin® Original Balling products.

Frequently asked questions

Answers to frequently asked questions about this product can be found in our FAQ section.

Container sizes

4 kg Box für 100–120 l / box for 26–32 US-gal.                   Art. Nr. 10304       10 kg Eimer für 250–300 l / bucket for 66–80 US-gal.    Art. Nr. 10310
25 kg Eimer für 625–750 l / bucket for 165–200 US-gal.   Art. Nr. 10325                 

eco friendly packaging
12,5 kg Karton für 310–375 l /
carton for 80–100 US-gal.     Art. Nr. 10312
20 kg Karton für 500–600 l /
carton for 130–160 US-gal.      Art. Nr. 10320

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