AutoPot 400L Flexi Tank PRO Waterbutt | Collapsible Water Storage Tank

🌱 AutoPot 400L Flexi Tank PRO Waterbutt — Guide & Product Information

💧 400L Collapsible Water Storage for Hydroponic Systems

The AutoPot 400L Flexi Tank PRO Waterbutt is a high-capacity collapsible water storage tank designed for hydroponic systems, grow rooms, greenhouses and irrigation setups. With a generous 400L capacity, it provides a practical reservoir solution for growers who need reliable water or nutrient solution storage without the bulk of a rigid plastic tank.

Its collapsible design makes it much easier to move through tight spaces, transport, store and position compared with traditional hard reservoirs. When not in use, it can be packed away neatly, making it ideal for grow rooms where space and access matter.

• ✔ 400L water storage capacity
• ✔ Collapsible design for easier storage and access
• ✔ Ideal for hydroponic, greenhouse and irrigation systems

Browse more reservoir options in our Tanks and Reservoirs category, or view the full Grow Systems range.

🛡️ PRO Design with Light-Tight Reflective Material

The Flexi Tank PRO is built with a reflective and light-tight design, helping protect stored water or nutrient solution from light exposure. This is especially useful in grow environments where reducing light penetration into reservoirs can help keep water storage cleaner and more stable.

• ✔ Reflective outer finish
• ✔ Light-tight construction
• ✔ Designed for serious grow room reservoir use

⚙️ Anti-Tip Design and Simple Assembly

The AutoPot 400L Flexi Tank PRO features an anti-tip design for added stability once filled and correctly positioned. It is also designed for simple assembly in minutes, with all fittings included, making setup straightforward for growers who want a practical tank solution without complicated installation.

• ✔ Anti-tip structure for improved stability
• ✔ Simple assembly in minutes
• ✔ All fittings included

For compatible AutoPot systems, browse our AutoPot Systems and Spares category, including the AutoPot 1 Pot Module and AutoPot XL Kits.

📏 Internal Capacity Markings for Easier Monitoring

Internal capacity markings make it easier to check water levels, monitor usage and manage reservoir refills. This is useful when preparing nutrient solution, planning feeding routines or checking how quickly a system is using water.

• ✔ Internal capacity markings
• ✔ Helps monitor water and nutrient solution levels
• ✔ Useful for larger reservoir feeding routines

🌿 Ideal for Hydroponic, AutoPot and Irrigation Setups

The AutoPot 400L Flexi Tank PRO can be used as a water or nutrient reservoir for compatible hydroponic and irrigation systems. It is especially useful where a larger water supply is required for multiple plants, automated systems or grow rooms where regular refilling needs to be reduced.

• ✔ Suitable for AutoPot and hydroponic systems
• ✔ Useful for drip feed and irrigation layouts
• ✔ Helps reduce frequent reservoir refills

For other irrigation and watering products, view the PLANT!T Water Timer, PLANT!T Watering Ring 200mm and Clarke PGH60 ½” Heavy Duty Garden Hose.

🔁 Related Reservoir Options

This listing is for the AutoPot 400L Flexi Tank PRO. If you need other water storage sizes or formats, Acorn also stocks a range of rigid and collapsible reservoir options.

• ✔ Flexi Tank Waterbutts — collapsible tanks in multiple sizes
• ✔ IWS Flexitanks — collapsible reservoirs for IWS and hydroponic setups
• ✔ IWS Tank — space saver hydroponic reservoirs

💻 Technical Specifications

• ✔ Product: AutoPot 400L Flexi Tank PRO Waterbutt Collapsible Water Storage
• ✔ Capacity: 400L
• ✔ Filled Dimensions: 73.5cm diameter x 105cm high
• ✔ Box Size and Weight: 76 x 76 x 13cm / 7.1kg
• ✔ Tank Type: Lightweight collapsible water storage tank
• ✔ Design: Reflective, light-tight and anti-tip
• ✔ Features: Internal capacity markings and all fittings included
• ✔ Assembly: Simple assembly in minutes
• ✔ Application: Hydroponic systems, AutoPot systems, grow rooms, greenhouses and irrigation layouts

🏡 Ideal Uses

• ✔ AutoPot reservoir setups
• ✔ Hydroponic water storage
• ✔ Nutrient solution reservoirs
• ✔ Grow room and greenhouse irrigation
• ✔ Larger systems needing reduced refill frequency
• ✔ Spaces where rigid tanks are difficult to fit

📏 Setup and Usage Tips

• ✔ Assemble fully before filling with water or nutrient solution
• ✔ Position on a firm, flat and level surface for best stability
• ✔ Rinse before first use to help keep stored water clean
• ✔ Use the internal markings to monitor water levels and refill timing
• ✔ Clean between nutrient changes to reduce residue build-up

For accurate feed preparation, use a Measuring Jug, Measuring Syringe or 5ml Pipette. For plant feeding products, browse Nutrients and pH Management.

❓ FAQ

What capacity is the AutoPot Flexi Tank PRO?
This model has a 400L water storage capacity.

What are the filled dimensions?
When filled, the tank measures approximately 73.5cm diameter x 105cm high.

Is the tank light-tight?
Yes — the live product page describes it as reflective and light-tight.

Does it include fittings?
Yes — all fittings are included with the AutoPot 400L Flexi Tank PRO.

Is it easy to assemble?
Yes — it is designed for simple assembly in minutes.

Why choose a collapsible tank instead of a rigid tank?
A collapsible tank is easier to transport, store and move through tight spaces where a hard plastic reservoir may not fit.