AQUA Biolife Pro Series Nuclear Grade Colour Changing Mixed Bed Di Resin (5 Litre) Aquarium Tool
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Mixed Bed Cation Resin (purple) – Most commonly used after single bed resins to polish any remaining contaminants. It contains both positive and negatively charged ions and will change from purple to amber as the cation resin is depleted. It is also perfect for single canister DI systems that have an excess of positively charged ions like calcium, magnesium, aluminum, ferrous and ferric iron. Mixed Bed Anion Resin (blue) – The most commonly used resin in single or dual canister RODI systems and contains both negative and positively charged. The anion beads contain a blue color changing indicator that will turn to an amber color when it is exhausted. This resin is excellent for systems that have an excess of negatively charged ions that are not removed by the membrane, like phosphates, nitrates, sulfates, etc. Single Bed Cation Resin (purple) – Contains only cation beads that focus on removing positively charged ions from the water that passes through it. As the resin becomes depleted it will change from a purple to amber letting you know at a glance when it is depleted. This is most commonly used as the first stage in a single bed DI system. Single Bed Anion Resin (blue) – Anion resin focuses on removing negatively charged ions and has a blue color changing dye that will change to amber as it becomes depleted. Single bed anion resin is commonly used as the second stage in a single bed DI system. Specifications: Polymer Structure: Styrene/DVB Polymer Type: Gel Functional Group: Sulfonic Acid (Cation) / Trimethylamine (Anion) Physical Form: Spherical Beads Ionic Form (as shipped): Hydrogen/Hydroxide Column capacity: >0.60 meq/mL Volume Ratio (Cation/Anion): 40/60 percent Water Retention: 55 to 60 percent Screen Size Distribution: 16 to 50 (U.S. Mesh) Resin Color: Purple (Cation) / Amber (Anion)