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Carbon dosing concentrate for nitrate and phosphate reduction



Product description

Carbon dosing concentrate for effective reduction of nitrates and phosphates. Suitable for all saltwater aquariums with increased phosphate concentration and a low nitratephosphate ratio, as frequently observed in reef aquariums with a calcium reactor.



  • efficient reduction of nitrate and phosphate in the reef aquarium

  • designed specifically for reef aquariums with coral calcium reactor; but is suitable for all aquariums with an increased concentration of phosphate and a low nitrate / phosphate ratio

  • suitable for an aquarium stocked with marine fish, soft corals, LPS, SPS, other filter feeders and/or crustaceans

  • easy-to-dose liquid solution





Application & Dosage

Begin with a daily dose of 0.1 ml per 100 l (26 USgal) of aquarium system volume and increase the dosage after 2 weeks, observing the animals and checking the nitrate and phosphate concentrations, by 0.1 ml per 100 l (26 US-gal) of aquarium system volume. Dose Tropic Marin® Elimi-NP into the flow of the pump to ensure proper distribution throughout the aquarium.

A daily dose of 0.5 ml per 100 l (26 US-gal) of aquarium system volume should not be exceeded. The concentration of phosphate in the reef aquarium should only be lowered slowly to avoid possible adjustment stress in the organisms. At the same time, the nitrate-phosphate ratio should not exceed 10:1.

We recommend the use of Tropic Marin® Elimi-NP at phosphate concentrations above 0.1 mg / l. At lower phosphate concentrations, we recommend the use of Tropic Marin® NP-Bacto-Balance.
With a nitrate-phosphate ratio greater than 10:1, we recommend the use of Tropic Marin® NP-Bacto-Balance rather than Tropic Marin® Elimi-NP, to best adjust the nutrient concentrations.

Using the 50 ml bottle: Attach the enclosed hose to the syringe and measure the desired amount of Tropic Marin® Elimi-NP with the syringe. The air that gets into the hose and syringe while pulling the syringe, does not affect the dosage. The bottom edge of the plunger always displays the correct dosing amount even if the desired quantity Tropic Marin® Elimi-NP, due to the air drawn in, is only in the hose and not in the syringe chamber. The air drawn in serves to empty the hose during dosing.

Using the 250 ml bottle: Turn the pump head counterclockwise to unlock it. Pressing the pump head once is equivalent to 1 ml.


Dosing calculator


Other product recommendations

To regularly determine the nutrient concentrations, we recommend the Tropic Marin® NO2 / NO3 -Test Professional and Tropic Marin® PO4 -Test Professional.

Tropic Marin® offers more products for checking the nutrient concentrations and for supplying microplankton. Ask your aquarium retailer for the effective bio-reactor 5000 and the suitable filter materials Tropic Marin® Bio-Actif Reactor 5000 suitable filter materials Tropic Marin® NP-Bacto- Tricks and water additives of Tropic Marin®.


Frequently asked questions

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

Container sizes

 50 ml/ 1.7 oz.                       Art.Nr. 24422                                           250 ml/ 8.45 fl.oz.                      Art.Nr. 24424


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