The Oceamo DUO system

Oceamo DUO is a supply system that optimally delivers your reef aquarium with alkalinity and calcium.

DUO offers many advantages in addition to this:

  • No dissolving or dilution necessary
  • DUO is simple: only 2 solutions, 1:1 dosage
  • DUO is very economical: the typical dosage is 10 ml per 100 l per day. 1 liter DUO contains 10 000 dKH units
  • DUO increases pH value and thus promotes coral growth
  • With DUO, strontium, boron, magnesium, potassium, fluoride, iodide, sulphate, bromide, selenium and rubidium are also added proportionally to the aquaria.

  • There is no ionic shift when using DUO
  • The quality of DUO is meticulously checked in the Oceamo laboratory
  • Oceamo DUO is optimally complemented by DUO Regulator. DUO can be flexibly supplemented with DUO add-ons with a source of phosphorus and nitrogen (optimal in case of nutrient deficiency) ​
The Oceamo DUO System: DUO KH und DUO Calcium

Winter notice:

DUO KH is highly concentrated, so ingredients can crystallize at cold temperatures. DUO KH should therefore not be stored in cold temperatures.

If crystallization has occurred (for example, during shipment), heat the DUO KH (for example, place it in the bath tub with hot water) and pan it back and forth until all ingredients have dissolved again.

Here are the most frequently asked questions about Oceamo DUO. If you have further questions we look forward to your message!

What is Oceamo DUO for?2024-07-01T19:37:59+02:00

Oceamo DUO is a system for the simple and effective supply of seawater aquaria with calcium and alkalinity (KH), the most important building blocks for the growth of hard corals in reef aquaria.

Additional to Ca and KH, DUO also provides the important elements potassium, strontium, boron, magnesium, bromide, sulphate and the trace elements rubidium, iodine, selenium and fluoride to create an optimum aquarium environment for healthy growth.

What are the advantages of the Oceamo DUO system?2024-07-01T19:37:21+02:00

DUO is very easy to use: it consists of only two components, which are usually dosed in the same amount. DUO does not need to be diluted or dissolved before use.

The composition of DUO prevents ionic shift (at 1:1 dosage). The pH value is raised by DUO, which accelerates the growth of hard corals.

The pH value is raised by DUO, which accelerates the growth of hard corals. By the use of DUO the use of CO2 scrubber to stabilize the PH can often become obsolete. This leads to lower operating costs.

In addition to the “main parameters” of calcium and alkalinity, DUO doses many other substances: strontium, boron, iodine, fluoride, bromide, sulfate, potassium, rubidium,selenium and magnesium. As a result, these important water parameters are adjusted to the coral’s consumption.

DUO dispenses with an organic content: this allows the product to be diluted as required, and the dosing of DUO does not deprive the aquarium water of any oxygen.

In our laboratory, all raw materials and products undergo a strict quality control (using ICP-MS and other methods). This enables us to guarantee the consistently high quality of our products.

How long does DUO last?2024-07-01T19:36:07+02:00

Oceamo DUO is very efficient: 10 ml increases the alkalinity in 100 liters tank water by 1° dKH. In an averagely populated aquarium, approximately 10 ml DUO is needed per day per 100 l.

An 80-liter nano tank can be operated with 1 liter DUO for an average of 125 days.

In which container sizes is Oceamo DUO available?2024-07-01T19:35:34+02:00

DUO is available in 1 l containers and 5 l canisters. For tanks over 500 l, we recommend the use of 5 l canisters. Our containers are spill-proof, and the 1000 ml containers are also equipped with a child safety lock.

How & when should Oceamo DUO be dosed?2024-07-01T19:34:33+02:00

DUO can be dosed manually or by a dosing pump. DUO KH and DUO Ca should be added with time delay (at least 10 minutes) at a high-flow point (e.g. the sump). It is best to divide the dosage into several individual portions to keep KH and Ca as even as possible.

Can the products be diluted? Does this limit the shelf life?2024-07-01T19:33:50+02:00

For very small aquariums, it makes sense to dilute DUO before use in order to achieve a higher dosing accuracy.

DUO can easily be diluted with osmosis water in any ratio, the shelf life is not limited.

How often should alkalinity and calcium be measured and dosage be adjusted?2024-07-01T19:33:23+02:00

We recommend to measure the alkalinity and calcium values every 2-3 days in the initial phase (after switching to DUO) and adjust the dosage accordingly. Do you need help finding the right dosage? Please contact us, we are happy to help!

Once established, alkalinity and calcium should be measured once a week.

Do all other water parameters, such as boron, strontium, potassium, magnesium, iodine and co, remain within the optimal range due to the dosage of DUO?2024-07-01T19:32:57+02:00

Each tank is different, which is why no product can permanently nail all water values to the set point. We have designed DUO to guarantee a basic supply, and so a critical lack of these items is highly unlikely. Nevertheless, the dosage is in an area where no unnatural enrichment is expected. It is recommended to run a water analysis in our laboratory every 3-6 months in order to be able to adjust the water parameters to the optimal value if necessary.

Does DUO cause an ionic shift, or an increase in salinity?2024-07-01T19:32:29+02:00

DUO is designed in a way that all essential components of the seawater are added so no ionic shift should happen.

Due to the dosage of DUO, additional sea salt is produced, which increases the salinity. This should be taken into account for water changes.

When dosing 1 liter of DUO, ~ 8.7 liters of seawater should be replaced with osmosis water to keep salinity constant.

Example 1) In a 1000 liter tank, 100 ml DUO are dosed daily. In order to keep salinity constant, once a week 6 liters of water should be replaced by osmosis water

Example 2) In a 100 liter tank, 10 ml DUO are dosed daily. To keep the salinity constant, 0.6 l of water should be replaced once a week with osmosis water.

With which products can DUO be supplemented?2024-07-01T19:31:55+02:00

We recommend supplementing the primary care by DUO with inorganic trace elements and organic nutrients (amino acids, carbohydrates). This supply is ensured by Oceamo Regulator A & O.

The DUO Add-Ons

We often identify during our analyses a nutrient deficiency that can promote problems for corals and undesired cyanobacteria or dinoflagellates.

To respond to this situation, we have developed the Oceamo DUO add-ons nitrogen and phosphorus. The add-ons are packed in a practical dosing syringe and are mixed with the DUO supply solutions according to the instructions.

Alternatively the add-ons can be diluted with RO water to generate a stand-alone dosing solution.

This results in many advantages:

  • Since DUO is dosed throughout the day, there is an even supply of nutrients. The availibility of nutrients is much more consistent than with occasional dosing

  • The DUO add-ons are very economical. On average, 10 liters of DUO can be supplemented with nutrients with one syringe unit.

  • In the syringe, the nutrient solutions are safely packed, eliminating the need for preservatives.
  • DUO add-ons are easy to use, with detailed instructions included with the product.

  • No extra daily care needed, automatic dosage via the Reef Care System DUO.

Due to the add-ons, DUO is flexibly supplemented with nitrogen or phosphorus- simply by mixing them into the DUO canisters or bottles. Very efficient and easy to use. Very efficient and easy to use

DUO add-ons are developed to be used in combination with the basic DUO system. Alternatively the add-ons can be diluted with RO water to generate a stand-alone dosing solution. The product is not suitable for direct (undiluted) dosing due to the risk of overdosing.

For more questions dont hesitate to contact us!

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