Under Current Hydroponic System Info

What is the Under Current® System?

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.

UC for web

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.

add back kit in use

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.

*OPTIONAL – 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.

Under Current® System Options

Boneless Spacing*: All Under Current® systems are available in a “Boneless” configuration. Boneless systems ship WITHOUT straight sections of piping allowing for custom plant spacing.

Remote Epicenter*: All Under Current® systems are available with a “Remote Epicenter”. This allows growers to place the Epicenter (Control Module) on the outside of their grow space or tent.
*Please note: Both of these options require growers to purchase, cut and glue PVC.

Under Current® System Sizing Guide

Check out our Under Current® frequently asked questions page to learn more about this amazing hydroponic system.

Want to learn to grow like a pro in the Under Current® system, take a look at our growers guide for step by step instructions and tips.

Simplify your grow and you may find yourself with more time. When used properly the UC will give you lots of extra time. You can’t buy that in a bottle.

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