It certainly has been a pretty poor summer to date, but you should not take things for granted on the temperature front – UK grow rooms continue getting warmer and warmer by the day.
Lifting up the lid of your feed tank to find brown and mushy roots remains an incredibly disheartening and all too frequent heat-related issue at this time of year, with failure to cool the nutrient solution almost always representing the cause.
A regular check of your plants goes some way towards eliminating the threat of a nasty surprise, as does the application of a good root stimulant like Rhizotonic, the insulation of tank surfaces using reflective sheeting and the installation of a closely controlled and highly effective ventilation system. However, for the most directly relevant preventative measure you also need to look at introducing a Hailea Nutrient Chiller.

Guaranteed to keep the nutrient solution between the optimum temperature range of 18oC and 21oC, this hard working refrigeration unit helps boost plant performance by producing a more suitable and stable root-level environment. The cooler water will hold more oxygen than warm water, leading to less hospitable conditions for harmful pathogens and significant improvements in nutrient uptake.
The Hailea Nutrient Chiller measures 338mm x 218mm x 325mm. It includes an integral thermostat that enables you to monitor tank conditions simply and quickly, and is a must have item for growers with IWS and bubbler systems. To manage a single tank only requires one additional small pump plus the necessary pipework – see more details below.
Setting up a nutrient chiller in a typical grow room
Items you will need:
- Hailea Nutrient Chiller
- Flexi-Pipe 13mm
- MJ1000 Maxi-Jet Pump or Idra 400 Sicce Pump
Items we also recommend
- MiMouse 30 Sicce Pump
- Professional Air Circulator
The process:
1.) Place the Hailea Nutrient Chiller somewhere cool – either by a window or door, or even if possible outside of the actual grow room itself
2.) Locate the MJ1000 Maxi-Jet/Idra 400 Sicce Pump at the end of your tank that is nearest to where you have positioned the Hailea Nutrient Chiller
3.) Run a piece of Flexi-Pipe from the outlet of the MJ1000 Maxi-Jet/Idra 400 Sicce Pump to the inlet of the Hailea Nutrient Chiller
4.) Run a piece of Flexi-Pipe from the outlet of the Hailea Nutrient Chiller to the furthest away end of your tank, ensuring that it is submerged in its final position

Optional:
5.) Sit a MiMouse 30 Sicce Pump at the opposite end of the tank to the MJ1000 Maxi-Jet/Idra 400 Sicce Pump and run this to stir the nutrient solution. Doing so will mix together the cold and warm water parts of the tank
6.) Set up a Professional Air Circulator near to the Hailea Nutrient Chiller to keep the unit cool
Additional Information:
- For the purposes of growing plants, the Hailea Nutrient Chiller suits tanks with a capacity of 100 litres and below
- Using the chiller it can take up to 20 hours to reach the desired water temperature
- This unit is not suitable for a 30C+ environment
- The pipework and pump required must let you achieve a flow rate of between 400 and 1100 litres per hour
We recommend opting for an Idra 400 Sicce Pump if attempting to cool taller reservoirs like those found on IWS systems, and a MJ1000 Maxi-Jet/Idra 400 Sicce Pump to service low level tanks








Comments