HydroLogic® Stealth-RO™ 300 Water Filtration System - 300 GPD - 98%+ TDS Removal - 2:1 Waste Ratio

300 GPD Ultrapure Water for Hydroponics & Precision Cultivation

The HydroLogic® Stealth-RO™ 300 is a purpose-built, compact reverse osmosis water filtration system designed specifically for gardening and hydroponics. Removing 98%+ of all contaminants from tap water, the Stealth-RO™ 300 produces 300 GPD of purified water at a 2:1 waste-to-product water ratio — a more water-efficient design than RO systems running 3:1 or 4:1 waste ratios — with an included optional 1:1 flow restrictor that cuts wastewater production by 50% further when conservation is the priority.

Everything needed for a complete installation is included right out of the box, including a Membrane Power Flush Kit for ongoing maintenance, so growers can go from unboxing to producing purified water without sourcing additional parts.

Key Features & Benefits

• 98%+ contaminant removal: removes 98% or more of all contaminants from tap water, providing a clean, consistent baseline for precise nutrient solution preparation.
• 2:1 waste-to-product ratio: produces 1 gallon of purified water per 2 gallons of waste, more efficient than systems running 3:1 or 4:1 ratios.
• Optional 1:1 ratio flow restrictor included: reduces waste water production by 50% when maximum water conservation is required.
• Designed for hydroponics: customized for growing applications with a garden hose connector, inline shut-off, and Membrane Power Flush Kit.
• Complete installation kit: includes 3-stage RO unit, 2 RO membranes, carbon filter, cleanable sediment filter, automatic shut-off cartridge, wall-mountable metal bracket, garden hose connector, inline shut-off, RO/drain and inlet lines, filter wrench, and instructions. Weighs 12.5 lbs, manageable for installation and occasional repositioning.

Who Should Use This

Perfect for hobby to small-commercial hydroponic growers, indoor cultivators, and precision horticulturists who require consistent purified water and want a complete, ready-to-install RO solution with minimal water waste and straightforward maintenance.

Compatibility

Replacement membrane: HydroLogic Stealth-RO 150 & 350 Membrane Element (HGC741650) — Pre-filter upgrade: KDF85 Catalytic Carbon Filter (HGC741622) — For low pressure/well water: Stealth-RO Pressure Booster Pump (HGC728897) — Dimensions: 18.5in x 16in x 6in.

Frequently Asked Questions

How much purified water does the Stealth-RO 300 produce?

The Stealth-RO 300 produces 300 GPD (gallons per day) of purified water under standard operating conditions. Actual daily output can vary with source water temperature and inlet pressure.

What is included in the complete kit?

The kit includes a 3-stage RO unit, RO membrane(s), a carbon filter, a cleanable sediment filter, an automatic shut-off cartridge, a wall-mountable metal bracket, a garden hose connector, an inline shut-off, RO/drain and inlet lines, a filter wrench, instructions, and a Membrane Power Flush Kit. No separate parts purchase is needed for a standard installation.

What is the waste-to-product water ratio?

Standard operation runs at a 2:1 waste-to-product ratio. The included optional 1:1 flow restrictor reduces waste water production by 50% when water efficiency is the priority.

What replacement parts does this system use?

Replacement membrane: HydroLogic Stealth-RO 150 & 350 Membrane Element (HGC741650). Pre-filter upgrade: KDF85 Catalytic Carbon Filter (HGC741622). For low inlet pressure: Stealth-RO Pressure Booster Pump (HGC728897).