400L Flexi Rez | Bloomroom Collapsible Water Tank

🌱 400L Flexi Rez — Guide & Product Information

💧 Large 400L Collapsible Water Tank

The 400L Flexi Rez is a large Bloomroom collapsible water tank designed for storing water in grow rooms, hydroponic systems, gardens, greenhouses and irrigation setups. Supplied flat packed, it can be assembled in minutes and provides a generous 400L reservoir without the bulk and awkward handling of a rigid plastic tank.

Its flexible design makes it especially useful where access is tight, where rigid tanks are difficult to move into position, or where the tank may need to be stored away when not in use.

• ✔ 400L water storage capacity
• ✔ Flat packed for easy transport and storage
• ✔ Assembles quickly in minutes

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

🔧 Space-Saving Alternative to Rigid Tanks

Rigid plastic tanks can be difficult to move through tight doorways, loft hatches, narrow grow rooms or awkward garden access points. The 400L Flexi Rez packs flat, making it easier to transport before setup and easier to store when not required.

• ✔ Easier to move than a rigid 400L reservoir
• ✔ Packs flat for easier storage when not in use
• ✔ Useful for larger grow rooms and irrigation setups

For smaller Flexi Rez options, view the 100L Flexi Rez and 225L Flexi Rez. For alternative collapsible reservoirs, browse Flexi Tank Waterbutts.

🌿 Suitable for Hydroponic and Irrigation Setups

The 400L Flexi Rez can be used to store plain water or mixed nutrient solution for hydroponic systems, drip irrigation, hand watering and general plant care. Its larger capacity makes it useful for growers who need more water storage and fewer refill interruptions.

• ✔ Suitable for hydroponic water storage
• ✔ Useful for nutrient solution storage
• ✔ Ideal for larger grow rooms, greenhouses and irrigation systems

For compatible systems, browse our Drip Feed Systems, AutoPot Systems and Spares and IWS Kits and Spares.

🚿 Useful for Watering and Feeding Routines

A 400L reservoir is useful where larger volumes of water or nutrient solution need to be prepared and stored. It can help support regular feeding routines, automated irrigation systems and larger watering schedules where smaller tanks would need topping up more often.

• ✔ Helps reduce frequent refilling in larger setups
• ✔ Useful for mixing larger batches of nutrient solution
• ✔ Practical for grow rooms, gardens and greenhouse watering

For watering accessories, 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 400L Flexi Rez. If you need another water storage format, Acorn also stocks other collapsible and rigid tank options.

• ✔ 100L Flexi Rez — compact collapsible water tank
• ✔ 225L Flexi Rez — medium collapsible water tank
• ✔ AutoPot 400L Flexi Tank PRO Waterbutt — premium 400L collapsible tank option

💻 Technical Specifications

• ✔ Product: 400L Flexi Rez
• ✔ Brand/Range: Bloomroom Flexi-Rez Water Tank
• ✔ Capacity: 400L
• ✔ Tank Type: Flat packed collapsible water tank
• ✔ Assembly: Takes minutes to assemble
• ✔ Use: Water storage, nutrient solution storage and irrigation reservoir
• ✔ Application: Hydroponic systems, grow rooms, greenhouses, gardens, irrigation setups and reservoir-based watering

🏡 Ideal Uses

• ✔ Larger hydroponic reservoirs
• ✔ Water or nutrient solution storage
• ✔ Grow room and greenhouse watering
• ✔ Drip feed and irrigation setups
• ✔ 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 before use
• ✔ Rinse before first use to help keep stored water clean
• ✔ Keep covered where possible to reduce debris and light exposure
• ✔ 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 400L Flexi Rez?
The 400L Flexi Rez has a 400L water storage capacity.

Does it come flat packed?
Yes — the Bloomroom Flexi-Rez comes flat packed and can be set up in minutes.

What is the 400L Flexi Rez used for?
It is used as a collapsible water tank or reservoir for hydroponic systems, grow rooms, greenhouses, gardens and irrigation setups.

Why choose a Flexi Rez instead of a rigid tank?
A Flexi Rez is easier to store, easier to move through tight access points and more convenient where rigid plastic tanks are difficult to position.

Can it store nutrient solution?
Yes — it can be used to store plain water or mixed nutrient solution for compatible hydroponic and irrigation systems.