Is Your Water Hurting Your Yields?
Unfiltered water's full of impurities. Left untreated it'll slow plant growth and damage your grow room equipment.
So what's in your water?
Find out more - Take a look at our infographic!
Picking a Filter
For best results, use an RO filter!
Our GrowMax Reverse Osmosis Filters remove up to:
- 99% of chlorine
- Reduce sediments to 5 microns
- 95% of salts & heavy metals
All GrowMax filters are easy to connect - you can use them right out of the box!
If buying an RO Filter, make sure it produces enough water:
|Pure Water Produced|
|Power Grow 500||up to 500 litres of pure water a day (20 litres an hour)|
|Mega Grow 1000||up to 1000 litres of pure water a day (40 litres an hour)|
|GrowMax 3000||up to 3000 litres of pure water a day (125 litres an hour)|
Feeding with RO Water
To prevent pH problems when using RO Water in your feed, make sure that you:
coco / rockwool
1) Add 0.25ml - 0.5ml of SHOGUN Silicon per L of RO
2) Adjust your pH to neutral
3) Add CalMag until your nutrient strength is 0.2 EC
4) Mix your nutrients as normal
in soil / pure organics
You can irrigate using straight RO water as there are already carbonate buffers in soil.
If you're not using a dripper or recirculating system, keep your nutrient moving with a water pump. Since there are no chloramines or chlorides in your water, it'll stagnate if left still for 5 days or more.
*When adjusting your pH, mix 1ml of pH down with 1L of RO water. Add 20ml of this mixture at a time to bring your pH down.
Here are a few extras you may need.
Grab a Booster Pump (if needed)
Reverse Osmosis filters need a water pressure of at least 40 PSI.
Tap water pressure varies, so you may need a booster pump – it’ll raise the pressure in your RO system by an extra 15-50 PSI (dependent on tap water quality and RO capacity).
For best results, aim for 60 – 80 PSI. With this pressure you'll get a better pure water to waste water ratio.
Keep spare Filters
You'll want to keep a carbon filter and sediment filter handy. Change them every 3 months to preserve the life of the RO membrane in your RO filter.
What are the signs of hard water?
Limescale at the end of your tap and on the inside of your kettle.
Does hard water affect grow lights?
You lose 10% of reflectivity over 3 months, due to mineral deposits on your lamp and reflector, if you use it with a humidifier.
Does hard water damage carbon filters?
Yes, unfiltered water clogs up filters, causing limited odour control and poor extraction while shortening your filter's life if you use it with a humidifier.
How do you test for hard water?
Use a CF meter: 0 - 3 CF (soft to moderately soft), 4 - 5 CF (medium to moderately hard) or 6+ CF (hard to very hard).
How do you remove water contaminants?
With an RO (reverse osmosis) Filter.
What does an RO filter remove?
CAC03 (Calcium Carbonate), MgC03 (Magnesium Carbonate) and Cl (Chlorine).
How easy are RO filters to use?
Very easy - you can connect them to a tap or pipe.
- From £11.16You save up to: £2.79