Tropic Marin

75g Phos-Start

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Particulate Nutrient Supply for New Reef Aquariums

  • Use for the First 2-3 Months of Cycling Phase
  • Stimulates the Microbiome
  • Includes Trace Elements Like Iodide, Fluoride & Bromide


Tropic Marin Phos-Start contains natural marine biopolymers as bacterial food to stimulate the microbiome in the startup phase of the new marine aquarium.

Phos-Start is particularly well suited for starting reef tanks using dry rock or for bare bottom tanks. These aquariums typically have a low supply of organic bacterial food and nutrients to stimulate bacterial and coralline algae growth. Phos-Start will fill the gap in nutrient and mineral supply and works to promote good coralline algae growth. It also prepares the aquarium to support and grow corals, including the most sensitive SPS.

The microbiome is supplied with vital particulate phosphate as well as bacterial food, calcium, and trace elements as fine particles. The nutrients are dosed in a targeted manner, avoiding unwanted nutrient increases in the water column. Later, these particles can be easily filtered out of the water and/or utilized by the corals resulting in increased coral growth with natural forms in the skeletal structure and bright colors, just like in a thriving coral reef under natural conditions.

After completion of the system cycling and first 2-3 months of the system’s operation, we recommend Tropic Marin Phos-Feed for targeted phosphate dosing.


Directions for Use:

Use for the first 2-3 months during initial cycling phase and in the young aquarium. Tropic Marin Phos-Start can be added at any time of the day or night, but since the application clouds the water somewhat, it's ideal to dose Phos-Start around the time the lights on the aquarium are turned off. This also takes advantage of the nocturnal polyp opening of the corals.

Half fill a container with approximately 200ml of water from the aquarium (Do NOT use reverse osmosis water) and add the calculated amount of Phos-Start. Mix powder and water well by stirring. Pour the mixture into a high flow area of the aquarium and rinse the cup with aquarium water.


Dosage: Start with a daily dosage of 1 ml (small measuring spoon) Tropic Marin Phos-Start per 100 US gallons of aquarium water. If after four weeks a phosphate concentration between 0.05 ppm and 0.15 ppm is not reached in the aquarium, double the dosage to 2 ml (larger measuring spoon) per 100 US gallons.

We recommend not to exceed a maximum dosage of 4 ml per 100 US gallons.



Ingredients: Natural calcium carbonate microparticles, phosphate mineral powder, natural biopolymers, iodide, fluoride and bromide.

Note: A temporary increase in algae growth is a normal part of a functioning startup phase in marine aquariums. This should not be a cause for concern. An initial temporary brownish discoloration of corals is an indication of the desired nutrient regulation in the aquarium and should also not be any cause for concern.

More Information
UPC 619106244623
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