The patented Under Current® RDWC Hydroponics System is recognized as the gold standard for hydroponic crop production.

The most proven and widely utilized Recirculating Deep Water Culture hydroponic system in the world, the Under Current® is renowned for producing the very highest quality fruits, flowers, and essential oil profiles.

This unique, high-performance water culture system utilizes negative water pressure to recirculate oxygenated nutrient solution through the plant’s root zone. Requiring no timers, the 24/7 circulation and aeration encourage rapid root growth and ensure pH and EC levels are uniform throughout the entire system.

Highly regarded for its unparalleled growth rates and record-setting yields, the Under Current® is simple to operate and well suited for residential, professional, and commercial facility applications.

Tight Spacing for More Smaller Plants
Suitable for Veg and Pre-veg Applications
Ideal for Auto Flower Varieties

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 reduce labor & maintenance
TOP-SHELF RESULTS: Optimal Resin Output. Strong Terpene Profiles.
CRAFT CULTIVATION: Ideal For Artisinal Batch Cultivation
FACILITY PROVEN: Trusted By Professional Growers Worldwide

The Under Current system is the world’s only recirculating water culture hydroponic system to feature the patented Sub-Current Culture circulation method. The Under Current is the cornerstone of the CCH2O Proven Production Approach when used with Cultured Solutions® Nutrients and the CCH2O Nutrient Dosing System.

Sub-Current Culture (SCC) technology utilizes negative water pressure to recirculate highly oxygenated nutrient solution through the plant’s root zone. This continuous fluid motion supercharges the nutrients with dissolved oxygen, creating hyper-aerobic conditions perfect for explosive plant growth.

Constant 24/7 nutrient circulation ensures pH and EC levels are uniform throughout the entire system.

This unique water culture application is unprecedented in layout versatility and ease of use. The Under Current consistently delivers awe-inspiring yields for any sized application, from hobby to commercial greenhouse.

This System Includes:

CCH2O Multi Mod Growth Modules with Drain Well
CCH2O 5.5″ Heavy Duty White Lids with Port Hole
CCH2O 5.5″ Heavy Duty Net Pots
CCH2O Easy Clean Manifolds with UC Spin-Tight Bulkheads

High Flow Aeration Manifold
Air Pump Bank with CCH2O Air Flow Regulator
Premium Linear Air Pump(s)
Danner Mag-Drive Return Pump with 1″ Return Hose

CCH2O Sintered Air Stone
CCH2O Drain Out Kit
Adjustable Float Valve with Reservoir Adapter Kit
Cultured Solutions XS Growers Pack
3-Year Limited Warranty.

Critical components of the Current Culture UC System

The best just got better! The Current Culture UC Systems now come with all of these components included so you can worry less and harvest more!

Current Culture

Current Culture H2O Under Current RDWC Hydroponic System - 13 Gallon, 40" Spacing

Current Culture H2O Under Current RDWC Hydroponic System - 13 Gallon, 30" Spacing