The Under Current® Recirculating Deep Water Culture (RDWC) System features the patented Sub-Current Culture® circulation method. This high-performance water culture system is unmatched in efficiency, layout versatility and ease of use. The Under Current® utilizes negative water pressure to recirculate oxygenated nutrient solution through the plant’s root zone ensuring pH and EC levels are uniform throughout the entire system.
The Under Current® is the cornerstone of the CCH2O Proven Production Approach when used with Cultured Solutions® Nutrients and the CCH2O Nutrient Dosing System.
Benefits of Growing in an Under Current®
Grow Trees
Yield More with Less. Reduce Plant Counts. More Production Per Plant.
Get Your Weight
Accelerated Growth Rates. Cut Veg Times. Heavy Yields = Heavy Profits.
Take A Vacation
Easy and Reliable. No Timers, No Guesswork. Reduced Labor & Maintenance.
Top-Shelf Results
Optimal Resin Output. Strong Terpene Profiles. Tests Clean.
Facility Proven
Ideal for Craft Cultivation. Trusted by Professional Growers Worldwide.
2019 Under Current® Updates
CCH2O Multi Mod
The Most Versatile Hydroponic Growth Module Available. Recessed Drain Well for Full System Drain. Raised Body for Thermal Cooling. Greenhouse Grade Heavy-Duty Construction. Water Level Marks and Smooth Interior for Easy Cleaning.
CCH2O Add Back Kit
Easily Add Back Nutrients and pH Adjustors to Your System Without Shocking Plants.
High-Flow Aeration Manifold
Even Distribution with More Air to Plants. Clean & Organized.
Air Pump Bank with CCH2O Air Flow Regulator
Easily Calibrate and Standardize Aeration Rates. Removes Air Pumps From Grow Space.
5.5” CCH2O Lids & Net Pots
Less Media. Easily Transfer Plants from Veg to Bloom.
Wider Center Aisle, 1” Return Hose & Bottom Drain Manifold
More Room Between Rows. High-Flow Circulation. Lower Volume to Prime Pump.
UC Drain Out Kit
Utilizes the CCH2O Drop Tee to Connect the Multi Mod Growth Modules. Provides A Centralized Point for Evacuation When Performing a Full System Drain.
The Under Current 4 Includes:
- 8 Gallon “Blackout Series” Growth Modules
- CCH2O 8″ Heavy Duty Lids with Port Hole
- CCH2O 8″ Heavy Duty Net Pots
- 2″ Manifold & Joints with 2” UC Spin-Tight Bulkheads
- Danner Mag-Drive™ Return Pump
- Premium Linear Air Pump(s)
- 9” Air Diffuser Disc
- Aqua-Pore Air Diffusers
- Air Distribution Manifold
- Air Hose, In-Line Filter(s)
- Adjustable Float Valve with Reservoir Adapter Kit
- Drain Valve
- Chiller Adapter
- Garden Hose Drain Adapter
- Cultured Solutions™ VEG A/B
- 1-Year Warranty
Inventory Last Updated: Apr 11, 2025
