HydroLogic Systems

Engineer Consistent Feed Water From Tap to Reservoir

Nutrient formulas are only as accurate as the water they're mixed into. Chlorine kills beneficial microbes in living soil and coco setups, chloramine resists standard carbon filtration, and fluctuating source TDS makes every EC reading a guessing game. HydroLogic's catalytic carbon and reverse osmosis technology remove that variable entirely, so every feed starts from the same clean baseline.

Why KDF85 Carbon and RO Membranes Change the Water Equation

Standard carbon filters struggle with chloramine, the compound most municipal water suppliers now use in place of straight chlorine. KDF85 catalytic media reacts with chloramine at a molecular level to break it down, something charcoal alone can't do reliably.

• Catalytic Carbon Filtration: The KDF85 media inside the TALLboy KDF85 targets both chlorine and chloramine simultaneously, protecting root zones and downstream equipment. Growers who prefer a dedicated carbon stage on its own can browse Water Carbon Filters for standalone options.
• Reverse Osmosis Membrane Technology: The Stealth-RO300 pushes water through a semi-permeable membrane, rejecting dissolved solids down to a near-zero TDS starting point, which is critical for growers running tight EC targets in coco or hydro.
• Sub-1 TDS Output: A clean, low-TDS baseline means nutrient calculators actually work as intended, since every additive is measured against water instead of water plus unknown minerals.

Matching GPH and GPD to Your Grow

System sizing comes down to two numbers: gallons per hour (GPH) for dechlorination and gallons per day (GPD) for reverse osmosis output, both of which should scale with reservoir size and refill frequency.

• Small Tent or Personal Grow: The MicRO outputs 75 GPD in a compact, portable footprint suited to single tents or countertop use where floor space is limited.
• Commercial or Multi-Room Operations: The Evolution-RO1000 scales output for larger reservoirs and multi-room facilities that can't afford downtime waiting on filtered water.
• Ecosystem Tip: RO membranes degrade over time and need periodic replacement to maintain rejection rates. Stock up in advance through RO Membranes so a worn membrane never becomes a production bottleneck.

Need dechlorination without full reverse osmosis? Browse Water Dechlorinators. For a complete overview of pre-filtration options, visit Sediment Water Filters.

Protecting Membranes and Extending System Life

RO membranes and carbon media are consumable, and how a system is used day to day has a direct impact on how long they last and how consistent output stays.

• Pre-Filter Before the Membrane: Running sediment and carbon stages ahead of an RO membrane keeps particulate and chlorine from prematurely fouling the membrane surface, extending its usable life.
• Match Flow Rate to Source Pressure: Low incoming water pressure reduces both output and rejection rate, so checking household PSI against a system's rated GPD prevents underperformance.
• Take Filtration on the Road: For outdoor grows or off-grid setups pulling from a hose bib, the GroGreen hose filter delivers KDF85 filtration without any plumbing modifications.

Getting GPD sizing right the first time saves both money and downtime. For a full breakdown of how to match a system to reservoir size and refill schedule, see the guide on sizing a reverse osmosis system for your grow room.

Frequently Asked Questions