- 2x RO Membranes
- 1x Green Coconut Carbon Filter
- 1x Cleanable Pleated Sediment Filter
- 1x 1:1 and 2:1 Ratio Flow Restrictors
- 1x Membrane Power Flush Kit
- 1x 1/4" QC Ball Valve Inline Shut-Off
- 1x 8' Length 3/4" White Inlet Tubing
- 1x 8' Length 1/4" Drain Tubing
- 1x 5' Length 1/4" Product Water Tubing
- 1x Double-Ended Wrench for Standard Filter & Membrane Housing
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HydroLogic Stealth-RO300 300GPD Reverse Osmosis System
starting from 0% interest financing from
/mo.
- Produces up to 300 gallons of ultra-pure water per day
- Lower total dissolved solids by up to 98 percent
- Configurable 1:1 or 2:1 waste ratio for water conservation
- View More Details
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VOLUME PRICING
Commercial & Bulk Purchasing
We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.
- You are scaling up your reservoir size because your current filtration system takes too long to replenish your supply
- You are optimizing your water chemistry because your source water has high mineral content that fluctuates too much
- The included flush kit is the difference between a membrane that lasts all season and one that clogs in a month
- We recommend keeping extra sediment filters on hand, especially if you pull from a high-sediment well source
- Growers who installed this system say they no longer deal with inconsistent nutrient concentrations in their feed
- Users report that the ability to switch waste ratios helped them save significantly on water costs in drought areas
HydroLogic Stealth-RO300 300GPD Reverse Osmosis System
As a hydroponic garden scales up, water demand scales with it — and a system sized for a small tent, such as the HydroLogic MicRO 75GPD, quickly becomes a bottleneck once reservoirs and irrigation runs get bigger. The HydroLogic Stealth-RO300 is built for that next tier, producing up to 300 GPD of ultra-pure, low-PPM water to keep pace with larger grow spaces without stepping up to a full commercial system like the HydroLogic Evolution-RO1000.
Like the rest of the Stealth-RO lineup, the RO300 lowers TDS by up to 98% and offers a choice of 1:1 or 2:1 waste ratios, delivering 50% water savings over similar RO filters. The included Membrane Power Flush Kit supports long-term membrane health, which matters more as daily output — and membrane workload — increases at this higher production tier.
Despite the higher output, the Stealth-RO300 keeps the same compact 18.5" x 16" x 6" footprint as the smaller HydroLogic Stealth-RO150, adding only modest weight (12.5 lbs) to fit nearly the same install space while roughly doubling daily capacity.
What's Included
Features
💧
Up to 300 GPD
Produces up to 300 gallons per day, suited for larger reservoirs and multi-room setups.
📉
98% TDS Reduction
Lowers total dissolved solids by up to 98%, even at this higher production volume.
♻️
50% Water Savings
Choice of 1:1 or 2:1 ratios keeps waste down even as daily output scales up.
🔧
Power Flush Kit Included
Supports membrane longevity under the higher daily workload of a 300 GPD system.
Specifications
| Specification | Value |
|---|---|
| Production Rate | Up to 300 GPD |
| TDS Reduction | Up to 98% |
| Waste Ratio Options | 1:1 or 2:1 |
| Test Conditions | 65 psi / 77°F source water / 500 ppm |
| Dimensions (H × W × D) | 18.5" × 16" × 6" |
| Weight | 12.5 lbs |
| Recommended Housing Replacement | Every 3 years |
Frequently Asked Questions
How much water can the Stealth-RO300 produce?
It's rated for up to 300 gallons per day of ultra-pure, low-PPM water under standard test conditions (65 psi, 77°F source water, 500 ppm) — roughly double the output of the Stealth-RO150.
Is this system a good fit for a larger or multi-room grow?
Yes — the higher 300 GPD output is designed for hydroponic gardens with larger water demands than a single small tent, while keeping the same compact footprint as the smaller Stealth-RO150.
How much does this system reduce TDS?
The Stealth-RO300 lowers total dissolved solids by up to 98%, maintaining the same filtration quality as the rest of the Stealth-RO lineup. If you only need to remove chlorine and sediment without impacting TDS, a system like the HydroLogic smallBoy may be a better fit.
Can I control how much water the system wastes?
Yes — it includes both 1:1 and 2:1 ratio flow restrictors, giving you control over the balance between production speed and water conservation, with roughly 50% savings over similar RO filters either way.
What comes with the system for installation?
It ships with 8' of 3/4" inlet tubing, 8' of 1/4" drain tubing, 5' of 1/4" product water tubing, a 1/4" QC ball valve shut-off, and a double-ended wrench for filter and membrane housing service.
What's the footprint of the Stealth-RO300?
It measures 18.5" x 16" x 6" and weighs 12.5 lbs — the same footprint as the Stealth-RO150, just slightly heavier to accommodate the higher-output components.
How often do the filter housings need to be replaced?
HydroLogic recommends replacing the housings every 3 years to maintain consistent filtration performance, and the included Membrane Power Flush Kit helps extend membrane life between changes.
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Questions About This Product?
Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)
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