Dupla Ultra-Pure Water Filter

Dupla Ultra-Pure Water Filter

  • High-quality ion exchange resin
  • Easy installation
  • Compatible with osmosis systems
  • Efficient removal of residues
  • Compact design
In stock, only 5 left
Free shipping on orders over € 60,- within Germany Change region
Express delivery possible
1-3 business days - order today and we’ll deliver Wednesday at the earliest
I want to order to 
confirm
Sale ends 20.10.2026
€ 
39.
90
€ 
29.
50
incl. 19% VAT
plus € 5,90 Shipping
Quantity:
Item is now in your shopping cart!
View my cart

Item question

We’re here for you!

Please enter your question and e-mail and we’ll contact you as soon as possible. It usually takes us up to 24 hours during business days to respond.

Thank you for your question!

Thank you, we’ll get in touch!

Close window

You already sent us a question.

Please wait a few minutes

Description

The Dupla ultrapure water filter is an ideal addition to osmosis systems and ensures the reliable removal of residual substances in the water. The filter housing is filled with 500 ml of Duresin RI, a high-performance ion exchange resin that was specially developed for the post-treatment of osmosis water. This filter effectively removes any residual ions that may remain in the water after the reverse osmosis process. It is connected directly to the osmosis system and is easy to install thanks to the included hose connections. The use of the Dupla ultrapure water filter guarantees even greater water purity, which is particularly beneficial for demanding aquariums.

Manual Ultrapure water filter - - download PDF

Features

  • Removes final impurities after the reverse osmosis process
  • Compatible with all standard osmosis systems
  • Filled with 500 ml of powerful Duresin RI ion exchange resin
  • Improves water quality for sensitive aquarium inhabitants
  • Easy installation thanks to included hose connectors
  • Ideal for post-treatment of osmosis water in freshwater and marine aquariums

Product Safety

Hazard statements according to GHS

GHS05

Signal word: Danger

Ingredients: Styrene-divinylbenzene copolymer with trialkylammonium groups in OH form & Styrene-divinylbenzene copolymer with sulfonic acid groups in H form

  • H318 Causes serious eye damage.

Safety instructions according to GHS

  • P280 Wear protective gloves/ protective clothing/ eye protection/ face protection
  • P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P310 Immediately call a POISON CENTRE/doctor.

Dupla

Dupla

Dupla is one of the brands of the family-owned company Dohse Aquaristik, which has stood for innovation and tradition in aquaristics since 1949. The Dupla brand focuses on creating the most ideal natural environment for aquarium animals, benefiting both the animals, aquarists, and retailers. The company is committed to values such as reliability and consistency, backed by 110 years of experience. With a wide range of products and a deep understanding of the needs of animals, Dupla has established itself as a reliable partner in the pet trade industry.

Manufacturer information

Manufacturer
Name Dohse Aquaristik GmbH & Co. KG
Street Otto-Hahn-Str. 9
City 53501 Grafschaft-Gelsdorf
State Rheinland-Pfalz
Country Deutschland
E-mail info@dohse-aquaristik.de
Website dohse-aquaristik.com/DE

General information

Item no.
121.0057.01
EAN 4011444805119
Weight 0,79 kg
Shipping weight 0,83 kg

Questions and answers about Dupla - Ultra-Pure Water Filter

You have questions about this product? Ask other customer or our support team about this product!

Customer reviews

This item has been rated 5 out of 5 stars
One review
Please sign in if you want to write a review. Sign in
5 Stars(1)
4 Stars(0)
3 Stars(0)
2 Stars(0)
1 Star(0)
Adrian H.
Works as described
27th April 2025

I use this filter after my reverse osmosis unit to lower the high remaining silicate level, among other things, and as a side effect to push the conductivity down a bit more,... (read more)

Translated from German
Show original

Wirkt wie beschrieben

Ich nutze diesen Filter hinter meiner Osmoseanlage, um u.a. den hohen verbleibenden Silikatwert zu senken und als Nebeneffekt auch den Leitwert noch etwas zu drücken, schließlich weiß man nie ohne es analysieren zu lassen was tatsächlich noch im Wasser verbleibt.

Das Wasser hier ist hart und silikatreich, und es gibt zumindest plausible Hinweise, dass dieser Silikatwert dafür sorgt, dass sich insbesondere empfindliche Caridinas nicht so entwickeln wie man es anhand des sonstigen Wassers erwarten würde.

Unabhängig davon, ob das nun bei dem Problem hilft, wirkt dieser Filter super. Silikat ist mit dem JBL Test unter der Nachweisgrenze, der Leitwert wird als 0,8 µS/cm gemessen.

Similar products