IWS Flexitanks 100L, 250L and 400L | Collapsible Hydroponic Water Reservoir

🌱 IWS Flexitanks — Guide & Product Information

💧 Collapsible Water Storage for Hydroponic Systems

IWS Flexitanks are practical, space-saving water storage tanks designed for growers who need a reliable reservoir without the bulk of a rigid plastic tank. These flexible tanks are supplied compactly, require no tools to assemble and can be set up in minutes, making them ideal for grow rooms, hydroponic systems, irrigation layouts and nutrient solution storage.

Their collapsible design makes them easier to store, transport and position compared with traditional rigid reservoirs, while still providing useful water storage capacity for feeding systems and grow room maintenance.

• ✔ Compact, collapsible water tank design
• ✔ Quick tool-free setup
• ✔ Ideal for water and nutrient solution storage

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

📦 Size Variations

IWS Flexitanks are available in three capacity options, allowing growers to choose the best reservoir size for their system, plant count and feeding schedule.

• ✔ 100L — suitable for smaller hydroponic systems, compact grow rooms and short feeding intervals
• ✔ 250L — ideal for medium-sized systems and growers wanting fewer refills
• ✔ 400L — best for larger grow systems, high water demand or extended reservoir capacity

⚙️ Quick Tool-Free Assembly

One of the main advantages of an IWS Flexitank is how easy it is to assemble. The tank is designed to be built without specialist tools, making it a convenient option when setting up or expanding a grow room.

• ✔ No tools required for assembly
• ✔ Takes minutes to build
• ✔ Packs down more easily than rigid reservoirs

🌿 Ideal for Hydroponic & Irrigation Systems

IWS Flexitanks are suitable for storing water or mixed nutrient solution for a range of hydroponic and irrigation systems. They are especially useful for growers running automated systems where a reliable reservoir capacity is needed.

• ✔ Suitable for hydroponic reservoir setups
• ✔ Useful for drip feed and flood systems
• ✔ Helps support larger irrigation layouts

For compatible automated systems, view our IWS Dripper Systems – 6, 12, 24, 36 & 48 Pot, or browse Drip Feed Systems and IWS Kits & Spares.

🔧 Compatible Accessories & System Planning

A reservoir is only one part of a complete growing system. Depending on your setup, you may also need pipework, fittings, pumps, measuring tools and nutrient management products to complete your irrigation layout.

• ✔ Works as a reservoir for compatible feed systems
• ✔ Useful for system expansion or replacement tanks
• ✔ Pairs well with pumps, fittings and measuring tools

For installation and maintenance, browse Pipe & Fittings, Water Pumps and our Measuring Jug product page.

💻 Technical Specifications

• ✔ Product: IWS Flexitanks
• ✔ Tank Type: Collapsible flexible water tank / reservoir
• ✔ Size Options: 100L, 250L and 400L
• ✔ Assembly: Tool-free assembly
• ✔ Use: Water storage, nutrient reservoir, irrigation tank
• ✔ Application: Hydroponic systems, grow rooms, drip feed systems and irrigation layouts

🏡 Ideal Uses

• ✔ Hydroponic water storage
• ✔ Nutrient solution reservoirs
• ✔ Drip feed and irrigation systems
• ✔ Grow room expansion or reservoir replacement
• ✔ Compact storage when not in use

📏 Setup & Usage Tips

• ✔ Choose the tank size based on plant count, system type and feeding frequency
• ✔ Assemble on a level surface for best stability
• ✔ Rinse before first use to keep nutrient solution clean
• ✔ Keep covered where possible to reduce contamination and light exposure
• ✔ Clean between nutrient changes to avoid residue build-up

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

❓ FAQ

What sizes are available?
IWS Flexitanks are available in 100L, 250L and 400L sizes.

Do I need tools to assemble an IWS Flexitank?
No — the live product page confirms the IWS Flexitank requires no tools for assembly and takes minutes to assemble.

What is an IWS Flexitank used for?
It is used as a flexible water storage tank or nutrient reservoir for hydroponic systems, irrigation layouts and grow room feeding setups.

Is this better than a rigid reservoir?
It is often more convenient where storage, transport or space is limited because it packs down more easily than a rigid tank.

Can it be used with IWS systems?
Yes — it is suitable for use as a reservoir alongside compatible IWS and hydroponic irrigation systems.