Autopot Systems – Passive Hydroponic Set for Beginners

Autopot Systems – Passive Hydroponics Starter Kit

Hydroponics can be intimidating. Pumps, timers, pH probes, solution circulation – it sounds more like a project for a tech enthusiast than for a gardener who just wants to harvest tomatoes on a balcony or chili in a grow box. That's exactly why Autopot was created. The system requires no electricity, has no pump, and operates on a principle so straightforward that you'll understand it in minutes. Yet it can deliver precisely the amount of water and nutrients your plants need at any given moment.

What is Autopot and why is it suitable for beginners

Autopot is a British manufacturer of passive hydroponic systems with more than thirty years of tradition. The word "passive" is key – the entire system operates without any electrical equipment. No pump, no timer, no grid connection. The nutrient solution reaches the roots purely through gravity via the patented AQUAvalve.

This represents a fundamental advantage over active systems, where a power outage or mechanical pump failure can destroy your entire crop within hours. With Autopot, that cannot happen. The solution tank sits higher than the pots; gravity does its job and the valve automatically regulates water supply. Your only responsibility is to keep the tank filled and the solution properly mixed.

How Autopot works: the AQUAvalve gravity system

The heart of every Autopot system is the AQUAvalve – a small mechanical device located in the saucer beneath the pot, which controls nutrient solution flow based on simple physics.

The principle of wet and dry cycles

AQUAvalve operates in two alternating phases:

1. Filling phase – An empty saucer triggers the valve to open; solution flows from the tank and the level in the saucer rises to approximately 1 cm.
2. Absorption phase – The plant consumes solution through its roots from the substrate. The valve remains closed while the plant drinks nearly all the saucer's contents.
3. Cycle restart – Once the level drops below a critical threshold, the valve opens again and the saucer refills.

This wet and dry cycle is fundamental to root system health. Roots need not just water, but also air. When the saucer dries out, air penetrates the substrate and promotes intense root growth. Then comes the next nutrient delivery. It mirrors the natural rainfall cycle.

What this means in practice

• No overflow – the valve prevents plants from standing permanently in water
• No underwatering – as long as there's solution in the tank, the plant gets water whenever it needs it
• No electricity – the system is powered entirely by gravity
• Minimal maintenance – just regular tank checks and refilling

Available Autopot models

Autopot offers several model lines that differ in the number and volume of pots and overall layout. Each model is built on the same AQUAvalve principle but differs in capacity and footprint.

Easy2Grow

Easy2Grow is the best-selling model in the entire range. Two 8.5-liter pots share one saucer with a single AQUAvalve – a compact solution that works especially well when you want to efficiently use every square centimeter of limited space.

The system comes in kits from 2 to 48 pots, always with a corresponding tank. The smallest assembly (2 pots) comes with a 47L tank. Easy2Grow is fully modular – it can be expanded anytime with an Extension Kit for additional pot pairs. It's suitable for tomatoes, peppers, chili, herbs, and medium-sized ornamental plants.

1Pot

The 1Pot model assigns each pot its own saucer with its own AQUAvalve. The 15-liter volume is significantly larger than Easy2Grow – a larger substrate volume gives roots more space and simultaneously improves the system's buffering capacity. Plants are then more tolerant of nutrient concentration fluctuations, which is appreciated if you can't check the tank daily.

1Pot suits larger plants or growers who prefer each plant to be supplied independently.

1Pot XL

1Pot XL is the largest single-container system in the range. The 25-liter volume (6.6 gallons) provides ample room even for vigorous root systems. This model finds use when growing large fruiting vegetables, shrubs, or in long-term crops where a smaller container would quickly limit growth. The principle is identical to standard 1Pot – each pot has its own saucer and valve.

QuadGrow

QuadGrow is a compact system with four eleven-liter pots on a shared saucer measuring 55 x 55 cm. This layout makes it ideal for smaller grow boxes or balconies where every centimeter counts. Four plants share one saucer, so the system is economical in both space and cost.

OctoGrow

OctoGrow extends the QuadGrow philosophy to eight eleven-liter pots on a saucer measuring 105 x 55 cm. The system comes with a 25L tank and a capillary mat ensuring even solution distribution to all eight plants. OctoGrow excels in linear arrangements – for example along a longer windowsill, in a narrow greenhouse, or in a rectangular grow box.

Model comparison table

All models are mutually compatible – they share the same hoses, connectors, and Autopot accessories.

Accessories: FlexiTank, Auto Top-Up, and AQUAsystem

The basic system can be expanded with several add-ons that fundamentally simplify daily operation.

FlexiTank

FlexiTank is a collapsible light-proof tank for nutrient solution. Unlike rigid plastic containers, it collapses to minimal size after the season for easy storage. Light-proof design is important for practical reasons – it prevents algae growth that could clog the valve or hoses. FlexiTank is available in sizes from 25 to 750 liters; for most home growers, 47 or 100 liters will be optimal. The tank is equipped with a tap and three inlet holes with pass-throughs for hoses.

Auto Top-Up

Auto Top-Up automatically maintains constant solution level in your main tank. Connect a larger reserve container or water line via a pressure-reducing valve, and the system handles refilling automatically. This accessory is especially worthwhile during summer months when plants consume large amounts of water, or during extended absences – no more worrying about finding a reliable neighbor to top up the tank.

AQUAsystem

AQUAsystem is a solution filtration and tank cleanliness maintenance kit. The filter captures sediments before they reach hoses or valves, extending the lifespan of your entire system. It's particularly useful for growers using hard water or organic fertilizers with higher particulate content.

System assembly step by step

Truly anyone can assemble Autopot. The entire process takes 15 to 30 minutes.

1. Choose the correct position

Position the tank at an elevated location so its bottom is at least 15 cm above the upper edge of the saucers. The greater the height difference, the more reliable the gravitational flow. If building a larger assembly, ensure the height difference is maintained to all saucers, even the most distant ones.

2. Assemble saucers and valves

Insert the AQUAvalve valve into the saucer following the included instructions. The valve must fit precisely in the designated recess and the inlet hose must pass through the correct hole. Incorrect valve installation is the most common cause of problems for beginners – pay careful attention to this step.

3. Connect hoses

Connect the tank to the AQUAvalve using the supplied hoses (typically 4 mm diameter). With multiple saucers, use T-connectors to branch the circuit. Always attach a filter (golf filter) to the tank outlet to capture impurities before they reach the valve.

4. Fill pots with substrate

For Autopot, lightweight, airy substrates with good capillary properties work best – coco fiber, coco-perlite mix (70:30 ratio), or pure hydroton. Heavy soil mixes have poor capillary properties and can cause uneven watering. Place a Root Control Disc at the bottom of each pot if included with your kit – it prevents roots from growing into the saucer where they could block the valve.

5. Plant your plants

Plant as you normally would. Important: during the first one to two weeks after planting, hand-water from above until the root system is sufficiently developed and actively drinks from the saucer. Starting the system too early is one of the most common beginner mistakes.

6. Fill the tank and start the system

Mix the nutrient solution per fertilizer manufacturer instructions. Check pH – the optimal range for Autopot is 5.8 to 6.5. Pour the solution into the tank, open the tap, and watch the saucer begin to fill. Once the level reaches the set height, the AQUAvalve closes automatically. The system is running.

7. Regular checks and solution changes

Check tank level every two to three days and top up with fresh solution. We recommend a complete solution change every one to two weeks to prevent salt buildup in the substrate and nutrient imbalance.

Autopot vs. active hydroponics: advantages and disadvantages

Advantages of Autopot

• No electricity – eliminates the risk of power failure and crop loss
• Minimal maintenance – just check and refill the tank
• Quiet operation – no pump, no noise
• Low acquisition costs – no pump, timer, or aeration equipment needed
• Reliability – fewer moving parts means fewer potential failures
• Water savings – closed-loop system with no runoff; consumption up to 50% lower than traditional gardening

Disadvantages of Autopot

• Slower growth – in active systems (DWC, NFT), roots have direct contact with oxygenated solution and plants grow faster
• Less precise watering control – cannot accurately set the frequency or duration of individual waterings
• Requires height difference – tank must sit higher than pots; in low spaces this can be problematic
• Substrate dependence – unlike DWC or aeroponics, requires physical growing medium
• Unsuitable for large-scale production – for commercial operations, active systems are more efficient and scalable

Most common Autopot mistakes

1. Insufficient height difference for the tank
Gravitational pressure is directly proportional to height difference. If the tank is too low, the valve cannot function properly. Tank bottom should be at least 15 cm above saucers – ideally more.

2. Starting the system too soon after planting
Plants with insufficiently developed root systems cannot draw from the saucer. Result: the saucer stays full and roots can rot. Hand-water from above for the first one to two weeks and activate the system only after clear root establishment.

3. Skipping the filter
Without a filter on the tank outlet, fine particles get into hoses and the valve, causing clogs. Disassemble and rinse the filter regularly – especially when using organic fertilizers with higher particulate content.

4. Wrong pH
Autopot is simple, but pH still determines nutrient availability. Outside the 5.8–6.5 range, certain elements become unavailable to the plant even though they're physically present in the solution. Measure pH at every solution change.

5. Excessive fertilizer concentration
In a passive system, you cannot quickly change the solution – salts accumulate in the substrate and damage roots. Use lower concentration instead and refill the tank slightly more frequently. Keep solution EC at values appropriate for the specific growth stage of your crop.

6. Light reaching the tank
A translucent or uncovered tank promotes massive algae growth, which clogs the valve and hoses. Use FlexiTank or cover the tank thoroughly with opaque material.

Frequently Asked Questions (FAQ)

Can I grow in regular potting soil with Autopot?
Yes, but a light, airy substrate with good capillary properties is recommended. Heavy soil mixes show poor siphoning and can cause uneven watering. Ideal options are coco fiber, coco-perlite mix, or hydroton.

How often should the nutrient solution be changed?
Optimally once every 7 to 14 days. The exact interval depends on plant number and size, ambient temperature, and fertilizer type. During summer months and in active growth phases, we recommend changing every 7 days.

Can Autopot be used outdoors?
Absolutely. The system has proven successful for growing tomatoes, peppers, and other demanding fruits and vegetables in greenhouses and on terraces. The tank must be protected from direct sunlight to prevent solution overheating and algae growth.

How many plants can one 47L tank support?
Depends on growth stage and plant type. Two to four medium-sized plants in full growth phase will last about 5 to 10 days with a 47L tank. In vegetative phase or with smaller species, much longer.

Can different Autopot models be combined in one system?
Yes. Easy2Grow, 1Pot, and other models use identical hoses and connectors, so they can be connected to one shared tank. The key condition is maintaining sufficient height difference to all saucers in the assembly.

Is Autopot environmentally friendly?
Very much so. The closed system produces no runoff or excess evaporation. Water consumption is up to 50% lower compared to traditional soil gardening, plus the system requires no electricity.

Conclusion

Autopot is probably the most accessible entry point into hydroponic growing. It requires no investment in expensive equipment or deep knowledge of hydro-engineering. The AQUAvalve gravity principle is proven by decades of worldwide practice and delivers reliable results with minimal effort. Whether you're starting with two chili pots on a balcony or planning to fill an entire greenhouse, Autopot's range includes a model that perfectly matches your needs.