Water Treatment · GrowoniX
GrowoniX EX400 Reverse Osmosis System
A non-electric 400 GPD reverse-osmosis system for higher-volume source water.
$439.95
Recorded 2026-10-08 · excludes shipping and tax. Confirm current price and availability with the retailer.
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Specifications
- Listed Output
- Up to 400 gallons per day
- Power
- No electricity required
- Controls
- Pressure gauge, manual flush and automatic shutoff
- Listed Product to Waste Ratio
- 2:1 under stated conditions
- Optional Stage
- KDF85 filter
Specifications checked 2026-10-08.
Planning notes
Best use
Preparing lower-mineral source water for a reservoir when local water makes nutrient control difficult.
Before you buy
Test source water first, plan the reject-water route and verify sufficient feed pressure before purchase.
Strengths noted
- The 400 GPD rating fits larger reservoirs better than small countertop filters.
- Manual flushing and a pressure gauge help with membrane care and troubleshooting.
Considerations
- Reverse osmosis produces reject water and removes minerals that may need to be restored.
- Real output varies with pressure, temperature and feed-water condition.