EHEIM Karbon with net bag (fromerly EHFIKARBON) is ideal for use with initial set-up of aquarium in order to bind dissolved harmful substances. EHEIM Karbon with net bag is pH-neutral. Before use, wash with hot water and rinse several times under cold water.https://www.aquaristikshop.com/aquaristic/EHEIM-Karbon-with-net-bag/250140/
- Andrei K. wrote about EHEIM Karbon with net bag in 2017:
Small pieces of carbon, nice bag with red clip. Water was clear all the time. Used in new aquarium for 4 weeks.