DI Resin Cartridge 10" x 2.5" – Refillable Color Changing Resin

10" x 2.5" refillable DI color-changing resin cartridge

Refillable 10 x 2.5" DI cartridge with color-changing resin, designed for the final stage of a RO/DI system in a reef aquarium. This mixed-bed cartridge removes the last dissolved ions, producing ultra-pure water with a TDS level close to 0, ideal for sensitive corals, clams, and invertebrates.

The great advantage is the visual indicator : the resin changes from a dark color to a light shade when it is exhausted, allowing for precise and guesswork-free replacement.

📏 Specifications

• Dimensions: 10" x 2.5"
• Type: Refillable cartridge
• Resin: Color-changing cation/anion mixed-bed
• Compatibility: Standard 10-inch RO/DI cases

💧 Typical use

Install as the final step after sediment, GAC, and/or carbon block to obtain the highest quality reverse osmosis water. When the resin changes color, it's time to replace the cartridge or recharge the resin.

✅ Key Benefits

• Ultra-pure 0 TDS water for reef aquariums, protecting tank chemistry and delicate animals
• Rechargeable , therefore economical: only the resin is replaced, not the entire cartridge body
• A clear visual indicator to know exactly when to intervene, reducing usage errors
• Standard 10 x 2.5" compatibility , easily integrated into most RO/DI enclosures
• A suitable format for regular hobbyists and professionals, facilitating storage and supply

🔄 When to replace or recharge

• As soon as the resin changes color towards the light shade indicating exhaustion
• If the output TDS exceeds 0–1 ppm, even if the color is not completely clear
• Depending on the volume of water produced, the quality of the incoming RO water, and the frequency of use

🔧 How to recharge quickly

1. Open the cartridge or the lid provided
2. Empty the old, exhausted resin
3. Fill with new color-changing resin, sold separately
4. Close, reconnect, and check the TDS

💡 Usage tips for optimal setup

• Before using the DI (Direct Injection) system , use a good pre-filter: sediment and/or GAC (Gas Acid Filter) to reduce chlorine, odors, particles, and organic matter. This protects the DI resin and extends the time between refills.
• Avoid using too many final media : a high-quality DI with a good pre-filter is more efficient than stacking similar blocks downstream.
• Keep spare resin sachets on hand to refill immediately when color change occurs, without interrupting ultrapure water production.