Hydro Logic ARCS - Stage 3 - pH Neutralizing/Remineralizing Cartridge (HL22015.3)

Stage 3 replacement cartridge for HydroLogic ARCS (Advanced Reef Cultivation System) water filtration systems. This final-stage filter balances and stabilizes pH while adding essential minerals back into ultra-pure RO water—critical for hydroponics nutrient uptake and reef tank calcium/alkalinity stability.

Key Features

• pH Neutralization – Balances and stabilizes pH to optimal levels
• Remineralization – Adds beneficial minerals back into RO water
• 10,000 Gallon Capacity – Long-lasting performance before replacement
• Stage 3 Finishing – Final polishing step in ARCS multi-stage system
• Prevents pH Swings – Creates stable water chemistry for plants and corals

Why pH Neutralizing & Remineralization Matters

Pure RO water is highly acidic and lacks essential minerals, which can cause pH instability and nutrient lockout in hydroponics or alkalinity crashes in reef tanks. This Stage 3 cartridge restores balance by neutralizing acidity and reintroducing trace minerals, giving you stable, biologically-active water that supports healthy growth.

ARCS Multi-Stage System Overview

• Stage 1: Poly-Spun Sediment Filter (removes rust, silt, dirt, sand) – Replace every 5,000 gallons
• Stage 2: Heavy Metal Reduction Cartridge (removes lead, copper, mercury) – Replace every 10,000 gallons
• Stage 3: pH Neutralizing/Remineralizing Cartridge (this product) – Replace every 10,000 gallons

Applications

• Reef aquariums requiring stable alkalinity and calcium levels
• Hydroponics systems needing balanced pH for nutrient availability
• Indoor cultivation with sensitive plant varieties
• Any RO water application requiring pH stability and mineral content

Part #: HL22015.3 | #741610

Replacement Schedule: Every 10,000 gallons of product water