Nothing matches all of those filters.
Reverse osmosis units
Rated by output per day, from 75 GPD up to 1000 litres.
GrowMax Mega Grow 1000 L/D Reverse Osmosis Unit – RO Filter
- Output Up to 1000 L/day, up to 40 L/h
- Salt and heavy metal removal Up to 95%
- Chlorine removal Up to 99%
- Sediment Down to 5 microns
- Minimum inlet pressure 2.75 bar / 40 psi
- Maximum inlet pressure 5.5 bar / 80 psi
- Water supply Cold only; protect from frost
- Carbon filter change Every 6 months
- RO membrane change 6 months to 2 years depending on usage and input EC
- System type Reverse osmosis, 3 stage
- Connections 3/8in inlet, 1/4in pure and drain lines
- Filter pack life 8,000 L of produced water
- Inlet fitting Garden hose adaptor, indoor tap adaptor
- Membrane 2 x High Flow 150 GPD
- Optimum working pressure 3 to 5 kg/cm² at 25°C
- Stages 3 - sediment, 2x carbon, 2x RO membrane
- Waste ratio 2 L to drain per 1 L purified
Out of stock
Hydrologic MicRO 75 RO System – 284L/Day Low-PPM Water
- System type Reverse osmosis (RO)
- Production capacity up to 75 GPD (284 L/day)
- Flow rate approx. 3 GPH (11.4 L/hour)
- Contaminant removal up to 98-99%
- Pre-filter replaceable KDF85/carbon
- RO membrane 75 GPD high-rejection
- Waste ratio 2
- Operating pressure 40-80 psi
- Includes pressure gauge, automatic shut-off valve, garden ...
- Connections 1/4in quick-connect, garden hose inlet
- Pre-filter life 1,000 gallons (3,785 L)
- Rated conditions 75 GPD at 25°C, 500 ppm, 60 psi
- Stages 2 - KDF85/carbon pre-filter, RO membrane
GrowMax Water Booster Pump Kit – For Reverse Osmosis Units
- Model GrowMax Water Booster Pump Kit (GMWROPUMPKIT)
- Compatible with GrowMax Power Grow 500 and Maxquarium 000 PPM rev...
- Use where inlet pressure is below 40 PSI (3 kg/cm²)
- Boosted pressure 60+ PSI (4 kg/cm²)
- Pump 24V DC diaphragm pump; open flow 0.26 GPM (about ...
- Power adaptor input 220–240V AC, 50/60Hz; output 24V DC, 1.2A
- Not for the Mega Grow 1000 (it takes the GrowMax High Flo...
Hydro-Logic Evolution-RO1000 Wall Bracket – For RO Systems
- Fits Hydro-Logic Evolution-RO1000
- Material stainless steel
- Includes bracket, screws, washers
- Dimensions 10.8cm x 29cm x 15.7cm (4.25" x 11.375"...
- Weight 0.5kg
GrowMax Component Kit – RO System Spare Parts
- Compatible with GrowMax Power Grow 500, Mega Grow 1000, Maxquariu...
- Format compartmented box of assorted fittings, restricto...
GrowMax 3000 Reverse Osmosis System – For Home Growing
- Output up to 3,000 L/day, 125 L/h
- Membranes 2 x 500 GPD, running in parallel
- Inlet pressure 4–6 bar (57–85 PSI) minimum-maximum
- Water supply cold only, max 25°C
- Removes up to 95% salts/heavy metals, up to 99% chlorine,...
- Cartridge life approx. 40,000 litres filtered
GrowMax Minimax 75 GPD Reverse Osmosis Unit – Mini RO System
- Output up to 10 L/h of pure water
- Membrane 75 GPD
- Removes up to 95% salts and heavy metals, up to 99% chlor...
- Features pressure gauge, flow limiter, automatic shut-off ...
- Suited to small tents, propagators, balconies and containers
GrowMax Max Pump 700 Reverse Osmosis System – With Booster
- Output up to 700 L/day, approx. 30 L/h
- Pump integrated pressure pump
- Waste ratio approx. 1.5
- Removes up to 95% salts/heavy metals, up to 99% chlorine,...
GrowMax Maxquarium 000PPM RO Filter Unit – 500 L/Day
- Output Up to 500 L/day, up to 20 L/h
- Purity 000PPM / EC 0
- Stages 4 — sediment and carbon filter pack, RO membrane,...
- RO membrane High flow 150 GPD
- De-ionisation filter 10in, removes 100% of mineral salts from RO water
- Filter pack 10in, change approximately every 4000L
- Salt and heavy metal removal 100% eliminated
- Chlorine removal Up to 99%
- Sediment Down to 5 microns
- Uses Grow room reservoirs and aquariums
- System type Reverse osmosis plus de-ionisation
- Connections 3/8in inlet, 1/4in pure and drain lines
- Inlet options Garden tap or under-sink, 3 connectors
- Maximum inlet pressure 5 kg/cm² / 80 psi
- Minimum inlet pressure 2.75 kg/cm² / 40 psi
- Optimum working pressure 3 to 5 kg/cm² at 25°C
- Waste ratio 2 L to drain per 1 L purified
Out of stock
GrowMax Power Grow 500 Reverse Osmosis Water Filter
- Brand GrowMax
- Model Power Grow 500
- Output Up to 500 L/day, up to 20 L/hour
- Salt and heavy metal removal Up to 95%
- Chlorine removal Up to 99%
- Sediment filtration Down to 5 microns
- Minimum inlet pressure 2.75 bar / 40 psi
- Maximum inlet pressure 5.5 bar / 80 psi
- Water supply Cold water only
- Membrane replacement 6 months to 2 years depending on usage and input EC
- Carbon filter replacement Every 6 months
- Frost protection Required
- System type Reverse osmosis, 3 stage
- Connections 3/8in inlet, 1/4in pure and drain lines
- Filter pack life 4,000 L of produced water
- Inlet fitting Garden hose adaptor, indoor tap adaptor
- Membrane High Flow 150 GPD
- Optimum working pressure 3 to 5 kg/cm² at 25°C
- Stages 3 - sediment, coconut carbon, membrane
- Waste ratio 2 L to drain per 1 L purified
GrowMax Water High Flow Booster Pump Kit – For RO Systems
- Product type RO booster pump kit
- Recommended for Inlet pressure below 40 psi (3 kg/cm2)
- Boosted pressure 60+ psi (4 kg/cm2)
- Compatibility GrowMax Water Mega Grow 1000 RO System
- Automation Shut-off valve included, requires a float valve kit
- Effect Increased water production rate, reduced wastewater
- Instructions Full fitting instructions included
Carbon filters and treatment
Full-flow chlorine and sediment filters, UV and booster pumps.
Inline DI Resin Water Filter – For Humidifiers
- Supplied by HydroGarden
- Filter type inline deionisation (DI) resin cartridge
- Resin Purolite polystyrenic resin, supplied fitted
- Exhaustion indicator resin changes from blue to gold
- Housing clear body with blue end caps and mounting clips
- Designed for RAM Wall Humidifier; suits other mains-fed humidi...
GrowMax UV Lamp Kit 22 LPM – For Water Treatment
- Flow rate 22 litres per minute
- Sterilisation kills 99.99% of viruses and bacteria, chemical-free
- Housing stainless steel lamp tube with mains ballast
GrowMax Eco Grow 240 Water Filter – Purifier For Plants
- Flow rate 240 litres/hour
- Filtration two-stage -- 5-micron sediment pre-filter plus ca...
- Chlorine removal up to 99%
- Sediment removal approximately 90% of particles above 5 microns
- Connections standard pipework/tap fitting, wall-mount bracket...
GrowMax Garden Grow 2-Stage Water Filter – For Hydroponics
- Flow rate 480 litres per hour
- Stages 2
- Media eco-friendly coconut carbon, enhanced absorption
- Removes chlorines, pesticides, herbicides, volatile organ...
- Connection inlet and outlet pipe
- Power none required
- Application filter before filling the reservoir, all mediums
- System type 2 stage sediment and carbon filter
- Connections 3/8in tubing with garden hose adaptors
- Filter change interval Every 6 to 9 months
- Filter life 27,000 L of filtered water per change
- Maximum inlet pressure 6 kg/cm² / 90 psi
- Minimum inlet pressure None required
- Sediment removal Up to 90% of particles above 5 microns
- Waste ratio No drain, no waste water
GrowMax Pro Grow 2000 L/h Water Filter – 2-Stage Filtration
- Type 2-stage water filter
- Flow rate 2000 litres per hour
- Media Eco-friendly coconut carbon
- Removes Chlorine, herbicides, pesticides, volatile organi...
- Connections 1/2in garden hose quick-connect in and out
- Best for Soil, coco and hydroponic reservoirs on mains water
- Chlorine removal Up to 99%
- Filter change interval Every 6 to 9 months
- Filter life 56,000 L of filtered water per change
- Maximum inlet pressure 6 kg/cm² / 90 psi
- Minimum inlet pressure None required
- Sediment removal Up to 90% of particles above 5 microns
- Waste ratio No drain, no waste water
GrowMax UV Lamp Kit 4LPM – Chemical-Free Water Steriliser
- System type UV water sterilisation system
- Maximum flow rate 4 litres per minute
- Disinfection efficiency up to 99.99% against bacteria and viruses
- Lamp power 6W
- Power supply 220–240V AC with 24V transformer
- Connections ¼" push-fit fittings
- Recommended lamp replacement every 12 months
Replacement membranes, filters and pipe
The consumables these units need at each service interval.
The full range
Reverse osmosis filters for grow room water
A reverse osmosis filter strips dissolved minerals out of tap water so you start from near zero PPM and the only thing in the tank is what you chose to put there. That matters most in the hard-water half of the UK, where mains water can arrive at several hundred PPM before a drop of feed goes in, carrying calcium and magnesium you did not ask for and that sit in the way of the elements you are paying for.
Size by output per day rather than by price. The GrowMax Power Grow 500 and the Hydrologic MicRO 75, rated at 284 litres a day, suit a tent or two; the Mega Grow 1000 steps up for a bigger room, and the Maxquarium 000PPM sits between them. If your mains pressure is low the membrane will only trickle, which is what the High Flow Booster Pump Kit is for. Membranes and filter packs are consumables, so keep spares: output tails off long before a unit stops working altogether.
Not everything here is RO. The Garden Grow and Pro Grow 2000 are two-stage carbon filters that take out chlorine and sediment but leave the minerals in, which is the cheaper fix if your water is soft and chlorine is the only complaint. Whichever you fit, RO water needs calcium and magnesium putting back before you feed. Free UK delivery over £60. Call 020 3488 0419 for help sizing a unit.