Description
A compact reverse osmosis unit for small tents, propagators and balconies
The GrowMax Minimax 75 GPD is GrowMax's smallest reverse osmosis system, built for growers who don't need a full-size unit — small tents (80x80cm and 90x60cm sizes), propagators, balconies and outdoor containers. It still strips the salts, chlorine and sediment that push your starting EC and pH around before you've mixed a single feed.
Key Benefits
- Compact footprint — sized for small grow spaces rather than a utility room
- Removes up to 95% of salts, heavy metals and other dissolved contaminants
- Removes up to 99% of chlorine and reduces sediment above 5 microns instantly
- Automatic shut-off — the built-in valve stops water once the reservoir is full
- Pressure gauge and flow limiter — keeps the unit running within its rated window
Small-space growers still deal with the same hard-water problems as a full room — shifting EC, stubborn pH and mineral build-up — just without the budget or bench space for a full-size RO system.
How to Use
Connect to a cold mains supply and let the built-in flow limiter and shut-off valve do the rest. Change the 75 GPD membrane roughly once a year, and the GAC pre-filter every 3–6 months depending on use and incoming water quality.
- Output: up to 10 L/h of pure water
- Membrane: 75 GPD
- Removes: up to 95% salts and heavy metals, up to 99% chlorine
- Features: pressure gauge, flow limiter, automatic shut-off valve
- Suited to: small tents, propagators, balconies and containers
- Stages: 2 (GAC pre-filter, RO membrane)
- Pre-filter: 10" sediment/activated carbon (GMWMINIGAC)
- Replacement membrane: GMWMEMB75
- Connections: 1/4" inlet, pure and drain lines
- Inlet fittings: indoor-tap and garden-tap connectors, shut-off valve
- Minimum inlet pressure: 40 psi
- Maximum inlet pressure: 80 psi / 5 kg/cm²
- Feed water limit: up to 1,000 ppm, 170 ppm hardness
- Water supply: cold only; protect from frost
