GrowMax Water solves the problem almost every UK grower has and most never measure: the water coming out of the tap. Chlorine, chloramine and dissolved minerals all interfere with feeding, and in hard water areas your starting EC can be high enough that you are effectively overfeeding before you add a single nutrient. GrowMax units strip that out.
- Carbon filter units: The Garden Grow filter unit at 11,520 L/day (480 LPH) removes chlorine and sediment without stripping minerals - see all water treatment and pumps.
- Reverse osmosis: Power Grow 500 L/day, Water Max 700 L/day, Mega Grow 1000 L/day and the Pro RO 3000 at 3000 L/day for larger rooms.
- Maxquarium 000ppm: A 500 L/day RO unit that produces genuinely zero-ppm water for growers who want a completely blank starting point.
- De-ionisation: 10in DI filters and complete DI filter kits to polish RO output down to zero.
- Booster pumps: Standard and high flow booster pump kits for properties with low mains pressure - RO output drops sharply below about 3 bar.
- Spares: 10in replacement filter packs, replacement RO membranes including 150 GPD, Pro 3000 membranes, float kits and replacement pipe.
Why choose GrowMax Water?
Control over your starting point. If you know your water is at zero, every EC reading you take afterwards is purely your feed - which makes diagnosing problems dramatically easier. For hard water areas it is often the single biggest improvement available.
GrowMax Water FAQs
Do I need RO or just a carbon filter?
If your tap water is soft and you only want to remove chlorine, a Garden Grow carbon unit is enough. If your water is hard - much of the South East, London included - reverse osmosis is the better answer.
How often do I change the filters?
Sediment and carbon filters typically every 6 months depending on use and water quality. RO membranes last considerably longer if the pre-filters are maintained.
Do I need a booster pump?
If your mains pressure is below roughly 3 bar, yes - RO production rate and membrane life both suffer at low pressure.
Should I add Cal-Mag to RO water?
Yes. RO water has nothing in it, so calcium and magnesium need adding back - see Cal-Mag supplements.
Why buy GrowMax Water from The Hydro Bros?
We stock the GrowMax Water range in full, ship discreetly across the UK and Europe, and know these products because we use them. With excellent customer reviews on Trustpilot and staff who actually grow, you get the right kit first time.
