The AutoPot 12.4 Gallon Hard Tank is a solid plastic reservoir with a pre-drilled 3/8" fitting hole, designed for growers who want something sturdier than a FlexiTank. It irrigates up to a 6-pot standard system, a 4-pot XL system, or a 4-pot XXL system from a compact footprint: 24" tall, 14.5" wide at the lid, tapering to 11" at the base. Available as a tank and lid only, or bundled with the golf filter and foldable stand.
Free shipping on orders over $49
30-day returns on all orders
Serving growers since 2006
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Open bucket vs. Hard Tank
Open Bucket or DIY Reservoir
No lid means light gets in, promoting algae growth in the reservoir
You have to drill your own fitting hole and hope for a clean seal
Dust, debris, and substrate particles fall into the open water
No matched stand, so you're stacking cinder blocks or improvising
Hard Tank
Snap-on lid blocks light and keeps the reservoir clean
Pre-drilled 3/8" hole accepts AutoPot fittings with no modification
Smooth interior wipes clean between grows, no corners for buildup
Optional foldable stand rated for 300 lbs, sized to fit the tank
Features
Why some growers prefer the Hard Tank
Irrigates Up to 6 Pots
12.4 gallons is enough for a 6-pot standard system, 4-pot XL, 4-pot GeoPot, 4-pot XXL, or any easy2GO or easy2Propagate setup.
Pre-Drilled for 3/8" Fittings
The tank comes with a factory-drilled hole sized for all AQUAvalve5 compatible 3/8" tubing and fittings. No drilling required.
Compact Footprint
24 inches tall, 14.5 inches wide at the lid, tapering to 11 inches at the base. Fits easily in a grow tent corner or on a shelf.
Optional Foldable Stand
The foldable stand has a 300 lb capacity, folds flat for storage, and includes a rubber grip surface to keep the tank from sliding. Assembled: 12.69" x 9.5" x 8.69".
Add a Golf Filter
The golf filter sits inside the tank and screens out debris before it enters your tubing. Available as a bundle option so everything arrives together.
Inline Tap Sold Separately
The Hard Tank does not include an inline tap. You will need a 3/8" shut-off valve inline tap to control flow from the tank to your system.
Specs
Hard Tank specifications
Capacity
12.4 gallons
Dimensions
24"H x 14.5"W x 11"W (base)
Fitting
3/8" pre-drilled hole
Min. Elevation
6" above AQUAvalve
Stand Dims
12.69"L x 9.5"W x 8.69"H
Stand Capacity
300 lbs
Lid
Included with all options
Inline Tap
Sold separately (3/8")
How to set up the Hard Tank
1
Install the grommet
Push the top hat grommet into the pre-drilled hole on the tank. This creates a watertight seal for your 3/8" tubing connection.
2
Add the golf filter
If you purchased the golf filter option, attach it to the inside of the tank fitting. The filter screens particulates before they reach your tubing and AQUAvalves.
3
Elevate the tank
Place the tank on the foldable stand or any sturdy surface at least 6 inches above your highest AQUAvalve. Snap the lid on to block light and debris.
4
Connect and fill
Run 3/8" OD tubing from the tank through your inline tap to your first tray. Fill the tank with water and nutrients, open the tap, and let the system run.
Add Tank Stand: Tank, lid, grommet, foldable stand
Add Stand and Filter: Tank, lid, grommet, golf filter, foldable stand
Do I need an inline tap? Yes. The Hard Tank does not include an inline shut-off valve. Add a 3/8" Shut Off Valve Inline Tap to control flow from the tank to your system. Call or email us: 716-217-0353 / help@happyhydro.com
If you want a permanent, sturdy reservoir that sits in one spot and doesn't move, get the Hard Tank. If you need something portable that folds for storage or ships flat, go with a FlexiTank. Both connect to AutoPot systems the same way with the same fittings.
AutoPot rates the 12.4 gallon tank for up to 6 standard pots, but more pots means more frequent refills. For systems larger than 6 pots, a 25 or 60 gallon FlexiTank gives you longer intervals between refills.
If your tank sits near grow lights or in direct sunlight, the reflective cover blocks light from entering the reservoir, which helps prevent algae growth. We sell the AutoPot Reflective Cover for Hard Tank separately.
Any sturdy, level surface that puts the bottom of the tank at least 6 inches above your highest AQUAvalve will work. The foldable stand is convenient because it's sized for the tank, supports 300 lbs, folds flat for storage, and has a rubber grip surface. But a shelf, cinder blocks, or a small table work fine too.
If you receive a defective or damaged unit, email us a photo at help@happyhydro.com and we'll make it right immediately: replacement or refund, your call. For change-of-mind returns, we accept returns within 30 days for items in new, resalable condition. If you're not sure whether this product is right for your setup, call us first at 716-217-0353. We'd rather answer your questions before you order.
Happy Hydro has been selling growing equipment since 2006. We've carried AutoPot for years because the systems work great and customers who buy them leave happy. Have questions before you order? Call 716-217-0353 or email help@happyhydro.com. We're easy to reach and happy to help!
Questions? We're easy to reach. Happy Hydro has been serving growers since 2006. Call or email us before you order, after you order, or any time something comes up. When you're happy, we're happy.
We ship fast from Buffalo, NY. Most orders land at your door in 3-5 business days. Free standard shipping on orders $49+, plain-box packaging, and real humans ready to help if anything goes sideways.
Free shipping on orders over $49
Plain-box discreet packaging
Serving growers since 2006
What to expect
When you order from Happy Hydro
Fast & Free on Orders $49+
Free standard shipping to the lower 48. Most orders ship same or next business day from our Buffalo, NY warehouse via UPS Ground or USPS Ground Advantage. Expedited options available at checkout. * Soils may incur added fees for Western US delivery * Some products ship direct from the vendor's warehouse to keep prices lower and get your order there faster
Every order ships in a plain brown box with no branding or logos. Your purchase stays 100% private. We can also ship to your local UPS Store on request.
Specs
Shipping details at a glance
Delivery time
3-5 business days
Default carrier
UPS Ground or USPS
Signature required
Orders over $500 only
Free shipping threshold
$49+ to the lower 48
International
Canada only Email help@happyhydro.com your address & a screenshot of your cart for a quote
Returns
30 days on most orders Exceptions apply — orders over $400, multi-box shipments, and some vendor items may incur return shipping charges. Full policy
Questions
Frequently asked questions
Shipping
Check the order confirmation sent to your email or phone after checkout — it includes a tracking link. If you use the Shop App, you can track your order there too.
Most orders arrive in 3-5 business days. Expedited options (2-day, overnight) are available at checkout if you need it sooner.
Signature is only required on orders over $500. For added privacy, we can ship to your local UPS Store so you pick it up on your own schedule — just ask.
We default to UPS Ground or USPS Ground Advantage. Select an expedited option at checkout and we'll use the appropriate carrier for that service.
P.O. boxes: Yes, for small and lightweight items.
International: Canada only. Email help@happyhydro.com your address and a screenshot of your cart for a shipping quote.
APO/FPO: Not currently available.
For Canadian orders, import duties and taxes are the buyer's responsibility. You'll complete payment using your tracking number at UPS.com when your package arrives.
Title and risk of loss pass to you once we hand off to the carrier, but that doesn't mean we leave you hanging. Email help@happyhydro.com and we'll work overtime to track it down and make it right.
Payment
We accept credit/debit cards, PayPal, Coinbase, and Happy Hydro gift cards. Your card is charged immediately at checkout.
Double-check your billing address and card number. For larger purchases, your bank may have flagged it — a quick call to authorize the transaction usually sorts it out.
Promotions
Enter your code in the "Promo code" box at checkout and click Apply. One code per order, but you can combine a gift card with a promo code if you have both.
Subscribe to our mailing list for exclusive discounts and early access to sales. You can sign up at the bottom of any page on our site.
Returns & Cancellations
Email help@happyhydro.com within 30 days of delivery and we'll get you a refund or replacement, your choice. Items must be in original packaging with all parts in resalable condition. Multi-light orders, grow tents, orders over $500, and multi-box shipments may incur return shipping charges. AK, HI, and international buyers are responsible for return and warranty shipping. Some vendor-specific policies may apply — check the product page for details.
Refunds are processed through Shopify within 10 business days. Most customers see the credit back in about 5 days.
Reply to your order confirmation email or email help@happyhydro.com as soon as possible. Canceled orders may incur a processing fee depending on your payment method:
Credit/debit card: 2.9%
PayPal or Venmo: 3.5%
International PayPal: 4.0%
American Express: 4.1%
Shop Pay Installments / PayTomorrow: 6.5%
Support & Policies
Call or chat with our grower support team at 716-217-0353, Monday-Friday 10 am-4 pm EST. You can also email help@happyhydro.com any time and we'll get back to you quickly.
Happy Hydro began as a pipe dream in a garage and has grown into something built almost entirely on word of mouth and repeat customers. Rather than focusing on raising margins and obsessing over profits, we've always believed that the right combination of competitive prices, superior products, and world-class customer service speaks for itself. Our philosophy will never change: when you're happy, we're happy.
Our commitment
What you can expect from Happy Hydro
Real People, Real Growers
Our grower support team isn't a call center. They know the products because they're passionate about growing. Reach us Monday-Friday, 10 am-4 pm EST at 716-217-0353 or help@happyhydro.com, before you order or after.
Hand-Picked by Growers, for Growers
Every brand we carry was chosen by our founders because it performs. We only stock premium brands we believe in, and every item is inspected before it leaves our warehouse.
Fair Prices and Free Shipping
We work hard to keep our prices as low as manufacturers allow, and we include free shipping on orders over $49 so there are no surprises at checkout. Find a lower price anywhere and we'll match it.
Authorized for Every Brand We Carry
We're an authorized dealer for every manufacturer on our site. That means you get the full manufacturer's warranty on every purchase. No grey market, no expired stock.
30-Day Returns on Most Orders
Hard to commit to a product you haven't tried. Return most items within 30 days in original condition and we'll take care of it. Read the full policy.
Secure Shopping, Private Data
Every transaction is SSL encrypted. We don't store payment information and we will never sell your data to anyone, ever.
Volume and Commercial Pricing
If you're a commercial grower or putting together a large order, reach out before you buy. We have pricing available that we can't advertise publicly. Call 716-217-0353 or email help@happyhydro.com and we'll take care of you.
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Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
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