Kolar Labs DI Resin – 7.5 lbs

Lewatit NM-65 is a premium-grade, color-indicating mixed bed deionization resin designed to deliver ultra-pure, zero-TDS water—ideal for advanced aquarium filtration. Manufactured by LANXESS®, a global leader with over 75 years of expertise in ion exchange resins, this resin combines high-capacity cation and anion gel-type resins in a precise 1:1 chemically equivalent ratio (H⁺/OH⁻ form).

Specially formulated for aquarium applications, Lewatit NM-65 not only ensures high purity but also features a built-in color indicator. The resin visibly shifts from purple to clear/neutral, signaling when it’s time for a replacement—making it both effective and easy to monitor.

Key Features:

• ✅ Zero TDS Output: Polishes water to 0 TDS following RO filtration

• ✅ Color-Changing Indicator: Purple resin fades to clear when exhausted

• ✅ High Purity: Virgin nuclear-grade resin with exceptional ion exchange capacity

• ✅ Vacuum-Sealed Freshness: Packaged in Mylar bags on the day of shipment to ensure maximum shelf life and performance

• ✅ Safe for All Aquarium Types: Perfect for reef, freshwater, and planted tanks

• ✅ Trusted Quality: Manufactured by LANXESS®, a global leader in water purification technologies

Product Specs:

• Resin Type: Mixed Bed (Cation + Anion)

• Color Indicator: Purple to clear when depleted

• Formulation Ratio: 1:1 chemically equivalent (H⁺ / OH⁻)

• Package Size:

  • 1 Pouch (640g / 1.3 lb) fills one standard 10" DI cartridge (packed tightly for best efficiency)

  • 7.5 lb bag provides 6 full refills of standard 10" cartridges

Instructions for Use:

1. Fill one standard 10” refillable cartridge with 640g (1.3 lb) of resin for optimal contact time and efficiency.

2. Use in conjunction with an RO system for best performance. DI resin should be the final stage for polishing water to zero TDS.

3. Monitor TDS levels using a TDS meter. Replace resin when output rises above zero or when the color changes from purple to clear.

4. If source water contains chloramines, pre-filter with catalytic carbon or a carbon block to extend the life of the resin.

Lewatit® NM-65 is the gold standard in deionization media for aquatics—delivering unmatched clarity, precision, and peace of mind for reef keepers and hobbyists who demand the purest water possible.

Note: Lewatit® is a registered trademark of LANXESS GmbH.