The Under Current® system is the world’s only recirculating water culture hydroponic system to feature our patented Sub-Current Culture® circulation method.
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.
Our 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.
Under Current® System Features
Modular Design • Multiple growth module sizes and plant spacing options • Easy to set up, break down and expand • 60+ system configurations to suit any size plant and grow space • Designed to accommodate a wide variety of lighting footprints
Premium Construction • Highest quality commercial and greenhouse caliber components • CCH2O’s proprietary parts are designed and manufactured in California • Systems utilize professional grade air and water pumps
Benefits of Growing in an Under Current®
Prolific Yield Potential • Increased growth rates produce larger overall plants and drastically reduce vegetative times • Higher productivity with fewer plants
Increased Efficiency • High levels of aeration and constant circulation optimize plants nutrient uptake capacity • Conserves water and necessitates less frequent nutrient change-outs
Proven Nutrient Formula • Our Cultured Solutions® premium plant nutrients are custom formulated specifically for the Under Current® system and high-performance hydroponics • Cultured Solutions® are pH stable, clean and highly chelated
Reduced Maintenance • pH, EC/TDS and solution temperatures stay uniform throughout the entire system • Easily adaptable to pH/nutrient dosers, top-off reservoirs and water chillers
Grower Support • We offer expert grower support to every Under Current® system and Cultured Solutions® nutrient user; we want you to be successful with our products. Let us help your garden thrive!
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.
*General Recommendation - Check Manufacturers Specifications for proper chiller sizing.
SYSTEM FOOTPRINT (FEET / METERS):
3’3" x 7’7" / 1m x 2.32m
TOTAL SYSTEM VOLUME (GALLONS / LITERS):
52 / 197
POWER USAGE (WATTS):
AIR PUMP SIZE(S) (LPM):
AERATION RATE (LPM PER GALLON):
WATER PUMP SIZE (GPH / LPH):
350 / 132
SHIPPING WEIGHT (LBS. / KG):
80 / 36.3
SHIPPING BOX SIZES (IN.):
The Under Current 4 Includes:
8 Gallon “Blackout Series” Growth Modules
CCH2O 5.5″ Heavy Duty Lids with Port Hole
CCH2O 5.5″ 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
Garden Hose Drain Adapter
Cultured Solutions™ VEG A/B
As soon as you place the order, an order confirmation will be emailed to you. This means we have received your order and payment. Payment is captured as soon as the order is placed. In rare cases, if the product is on backorder or unavailable, we will contact you and ask if you would like to wait for the product to become available, switch your product, or have your payment refunded. If the item is available for shipment we will submit the order for processing and arrange shipment. Please see current estimated lead times on the product page for each product.
***We cannot change the shipping address after the order is placed.***
Most products ship within 2 to 3 business days from the date of your order (unless indicated on the product page). Some items take a bit longer to ship since they are built to order (i.e. ChilLED Tech, Trimmers, etc). We will send you tracking information as soon as it is available. If a week has gone by and you do not have tracking information yet, please reach out to us.
We are based in Portland, Oregon with warehouses nationwide. We offer FREE shipping in the lower 48 states (sometimes to HI and AK, too) via FedEx, UPS, USPS or other major couriers (product/brand dependent). Expedited shipping is usually available for an extra cost. Contact us before your purchase if you prefer an expedited shipping method and we will get you a quote.
After the order is processed, allow 2 to 7 business days for the product(s) to reach you if shipped to a U.S. address. We can ship to PO boxes in some cases. We recommend using a street/residential address instead.
Nearly all of our brands can be shipped internationally using FedEx, UPS, USPS, DHL or other couriers.Most quotes can be obtained at checkout. If not, please email us to receive a shipping quote for lights shipped outside of the USA. You may also place an order on our online store for items that require a quote and we will notify you via email on the exact shipping costs.
Some items/brands can be shipped for free.
Items shipped internationally from the USA may have VAT, duties, taxes, and/or local charges due at delivery. These charges are the responsibility of the customer and not LED Grow Lights Depot.
If you need to cancel your order, we recommend reaching out to us ASAP. We charge a 2.9% (credit card), 3.5% (PayPal), 4.0% (PayPal International), 4.1% (American Express), or 6.5% (Shop Pay Installments or Sezzle) order cancellation fee after the order was received. We can accommodate most requests, but due to the different time zones and schedules that our warehouses ship from, sometimes the cancellation request may not reach the warehouse in time before the product ships. Once the item has been arranged to ship or has shipped, the package will be treated like a 'return' and is subject to ship-back fees and restocking fees. If you purchased 'Route Package Protection', this can not be refunded after the order has shipped.
All EZTrim orders are final and non-refundable or returnable.
See our full Return Policy for rules and guidance on returning an item after purchase and for brand-specific return dates. A 5-25% restocking fee (brand dependent) may apply for returns within the dates of the return policy. Reach out to us for exact return instructions and restocking fees for the item(s) that you purchased since these vary by brand. 'Route Package Protection' cannot be refunded if an item is returned en route or after you receive it.
If you have any questions or would like to check the availability of an item, you may email us here or call us at (888) 611-9305. Thank you for shopping with us.
We now offer Route package protection to help cover the cost of lost, damaged, or stolen packages.
What is Route Protect?
Adding Route Package Protection to your order at checkout means that your order is protected against being lost, damaged, or stolen. In the unfortunate instance that you experience one of these inconveniences, you can report an issue with Route and they will work with you to make sure you get the resolution you prefer.
Purchased Route Protect and need to file a shipping issue? File here
General shipping, tracking, and issues questions
Route Refunds vs Reorders
Refunds: When refunding an item, Route covers the subtotal of the order. Shipping costs, taxes, and the Route premium are not included.
Reorders: Route will reorder the items, but please note that items can only be replaced depending on in-stock availability. All reorders have Route Shipping Protection added, for free!
Issues can be approved no earlier than 5 and no later than 15 days from when it was marked delivered Orders over $100 USD require a police report
Stuck In Transit (Lost)
Issues can be approved no earlier than 7 days and no later than 30 days from the last update (US), 60 days from order dateIssues can be approved no earlier than 20 days and no later than 30 days from the last update (International), 60 days from order date
File issues for damaged items with photos of the package and item (required) and no later than 15 days from when it was marked delivered.
What if my order never arrives or is stolen?
To protect your order against loss or theft, add Route package protection at checkout.
When you add Route Protect, you can easily file an issue for a lost, stolen, or damaged package. When you file an issue, it will be reviewed for approval for a reorder or refund within 1-2 business days.
What if my order is damaged?
To protect your order against damage that occurred during shipping, add Route Protect (package protection) at checkout.
When you add Route Protect at checkout, you can easily file an issue for a lost, stolen, or damaged package. When you file an issue, it will be reviewed for approval for a reorder or refund within 1-2 business days.
If your order has defects or you suspect it was damaged during manufacturing, please reach out to us here and we will be happy to work with you to remedy the situation.
How do I file a shipping issue for my lost, stolen or damaged order?
If you insured your order with Route Protect at checkout, you will receive a confirmation email from Route with a link to file a shipping issue.
You can also file a shipping issue on Route’s app or via the web here.
Yes! When you insure your orders with Route Protect, stolen items are eligible for reorders or refunds.
What if I need to cancel or return my order?
LED Grow Lights Depot can only reimburse you for Route package protection if the order has not shipped yet. If an order is cancelled en route or if you want to return your order, we cannot refund you for the Route package protection. No partial refunds for Route will be granted.
Yes. Route is a licensed insurance company with SEG Insurance Ltd. as its partner.
1) Thousands of Successfully Shipped Orders and Thrilled Customers
We have been in business since 2014 and are a highly-trusted online retailer offering honest grow advice and top-of-the-line LED grow lights and other grow/harvest/extraction equipment. We have thousands of 5-STAR PRODUCT REVIEWS from satisfied customers.
2) Small, Family-Run, Veteran-Owned Business
Founder/Owner Erik H. overseas that every customer is 100% satisfied with their purchase. If something is wrong, we will make it right, guaranteed! Call, email, or message us anytime and we will get back to you in about 1 business day or less (typically with-in minutes or hours during normal business hours). We have your back!
3) Free Discreet Shipping in the USA
We offer FREE shipping in the lower 48 states via FedEx, UPS, USPS, or other popular couriers. We can ship most other products to Hawaii and Alaska for free too.
4) Reliable International Shipping Available
Nearly all of our brands can be shipped internationally using FedEx, UPS, USPS, DHL or similar couriers. Go through the checkout process to receive a shipping quote or contact us if a shipping quote is not available at checkout.
Items shipped internationally from the US may have VAT, duties, taxes, and/or local charges due at delivery.
5) No Sales Tax in Some States
Forget shopping locally or on other popular retail websites that charge tax. You can save a lot of money when buying though us since we do not charge tax in some states.
6) 100% Low Price Guarantee
We strive to ensure that we offer the absolute best prices online. Rest assured that you are receiving the best online price when you shop with us.
If you find a better price online before or after you order from us (for up to one week), we will match or beat the competitor's price.
Although rare, we may refuse to offer a price match in which we incur a loss.
7) Easy Interest-Free Financing
Finance your purchase in minutes! See our available financing options below:
PayPal Pay in 4: Choose PayPal at checkout then select Pay Later before selecting Pay in 4. Get a decision in seconds and make your first payment to complete the purchase. Make the remaining 3 payments - one every two weeks, in the app or online.
ShopPay Installments: 'Buy now, pay later’ with Shop Pay Installments with limits up to $17,500. Have the flexibility to split your purchases into 4 equal payments with 0% interest, no fees, and no impact to your credit score. Select Shop Pay Installments at checkout.
Sezzle: Buy what you want today and pay for it over four installments, interest-free. Look for the Sezzle button at checkout. Get approved up to $15,000. LEARN MORE.
8) Route Package Protection
Adding Route Package Protection to your order at checkout means that your order is protected against being lost, damaged, or stolen. In the unfortunate instance that you experience one of these inconveniences, you can report an issue with Route and they will work with you to make sure you get the resolution you prefer. LEARN MORE.
9) We are Authorized Dealers offering a Manufacturer's Warranty
You will buy confidently from us since only sell new, official products (no used items or clones). All warranties are new are 100% honored through the respective manufacturer.
10) Safe, Secure, Discrete Transactions
We accept major credit cards and debit cards, PayPal, Google Pay, Apple Pay, Sezzle, ShopPay, bank transfers, and money orders. All card payments are processed through our encrypted SSL security processing system. Your identity is always protected.
11) Hassle-Free Returns
And just in case your purchase was not up to your standards, we offer return shipping if you are not 100% satisfied for any reason. See our FULL RETURN POLICY for full details.
Led grow lights depot were a pleasure to order from. The uc 6 xl is a great system and I am currently almost through my first run. No complaints. If you dont use current cultures nutes than go with half strength on the nutes you do use. Will be ordering other products from led grow lights depot in the future. There customer service is outstanding.