25mm Kool Tube

Bigger system, more solution moving, more heat to manage

The 25mm Kool Tube is the larger-bore option in Hydro Crop Shop's Kool Tube range, built for main feed lines and top-up runs carrying higher volumes of nutrient solution around bigger hydroponic systems. It shares the same dual-core construction as the 13mm and 19mm versions: a white outer layer that reflects heat and ambient light and a black inner layer that blocks UV from reaching the solution inside.

Key Benefits

• Dual-core construction reflects heat and blocks UV for a cooler, cleaner nutrient run.
• 25mm bore suited to main lines and higher-volume feeds.
• Flexible pipe routes easily around larger reservoirs and systems.
• UV-blocking inner curbs algae in warm, lit pipe runs.
• Fits standard 25mm irrigation fittings.

Is warm nutrient solution holding back a bigger system?

The more solution a system moves, the more surface area meets grow room heat along the way, and a warm main line feeding a large table or multiple pots means poor nutrient uptake and weaker roots across the whole crop, not just one plant. Shielding the main feed from heat and light helps hold reservoir temperature down and cuts the algae that thrives in warm, lit pipe.

How to Use

• Cut to length and connect with standard 25mm push-fit or barbed fittings.
• Route away from lights and heaters where possible, keeping bends gentle to avoid restricting flow.
• Pair with a cooler reservoir location or a chiller for best results in a large system.