Dupla RO 300 Osmosis System

For clean aquariums

€ 119,99

(Price shown includes 20% VAT. - Excludes delivery costs)

Content: 1 set

Delivery estimated by Tuesday, 18 October

In stock from October 17

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Features & Advantages

  • Complete pre-assembled osmosis system
  • Creates an optimal source of water for fresh and saltwater
  • Incl. Carbon filter, 5 µm fine filter, flow limiter
  • Incl. ¾ inch connection for water pipe
  • 220-300 litres/day

Item no.: DOH-80549, Content: 1 set, EAN: 4011444805492


The Dupla RO 300 osmosis system is a complete reverse osmosis system for creating optimal initial water for fresh and saltwater aquariums.

The Dupla RO 300 reverse osmosis system creates an optimal source of water for fresh and saltwater aquariums. Tap water is not always suitable for aquariums and should, therefore, be treated with a reverse osmosis system that extracts minerals and salts from the tap water. Reverse osmosis systems create an optimal source of water for fresh and saltwater aquariums. Often, many water problems can only be solved by using osmosis water. Reverse osmosis systems work on the principle of physical filtering. Unlike ion exchangers, for example, which exchange hardness-forming ions (e.g. calcium) for other non-hardness-forming ions (e.g. sodium), pollutants (e.g. silicate and nitrate) and hardness formers are physically removed from the water in the reverse osmosis system. In a reverse osmosis system, the water runs through the pressure of 2-6 bar in common household water pipes through a semi-permeable membrane. The substances dissolved in the water (pollutants, salts or hardening agents) cannot pass through the small lattice structure of the membrane and remain in the residual water. This residual water is derived as a concentrate and can be safely used as cleaning, irrigation or service water. Dupla reverse osmosis systems have a retention rate of 95-98% of all pollutants in tap water.

By switching on a Dupla ultrapure water filter (optional accessory), even the slightest residues of silicates and nitrates can be removed completely.

Osmosis water has only a very low conductivity and is salted up again with special salts according to the respective requirements.
The Dupla RO 300 osmosis system has an average output at 8-15 ° C and 2-4 bar pressure of 120-200 litres of process water per day. The retention rate is, for example: nitrates 92-97%, sulfates 97-98% and silicates 94-96%. The system also contains a carbon filter, a 5 µm fine filter, a flow limiter and a ¾ great connection for the water pipe.

Technical specifications:
Max. Output 300 l / day, depending on the quality of the initial water
Average output 100 - 160 l / day at 8 - 15 ° C and 2 - 4 bar pressure
Retention rate 95 - 98%
Aluminium - 97 - 98%
Cadmium - 95 - 98%
Bacteria - 99%
Nitrates - 92 - 97%
Silicates - 94 - 96%
Sulfates - 97 - 98%
Hardener - 95 - 98%

Ratio of concentrate: permeate 4: 1/3: 1 depending on the quality of the initial water

Conductivity tap water: Permeate 1,000 µS / cm: 50 µS / cm 300 µS / cm: 15 µS / cm

Conductivity tap water: Peremat with downstream Dupla ultrapure water filter 1,000 µS / cm:> 1 µS / cm 300 µS / cm:> 1 µS / cm

Our expert Oliver Knott recommends:

With the Dupla RO 300 osmosis system, you can prepare your aquarium water professionally and tailored to the needs of your fish!

Brands (Manufacturers): Dupla

Questions & Answers about Dupla RO 300 Osmosis System

Receive answers from other customers who purchased this product. Please forward any other order-related questions to our Customer Service Team.

  • According to the instruction, collect the discharged pure water ( permeate ) in a container . Instead of a container ,Can it connect to a long hose and directly to the fish tank ?

    1 Answer, last answered on 21 December 2020

Customer Reviews

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