The Modern Reef ION-X A is an ion exchange resin (deionisation mixed bed resin) for reverse osmosis (RO/DI) systems in marine aquariums. It is used to remove unwanted ions from water before it enters the reef.

• Removes unwanted anions and cations from the osmosis water.
• Helps achieve 0 TDS water for seawater preparation.
• Reduces the risk of introducing unwanted elements into the aquarium through RO water.