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overheat protection
This block is big enough to grow a large plant for its entire life
The granules expand when hydrated
The downward protrusions make it virtually impossible for the directed roots to escape root tip pruning
and so will yours
ILS4T ON Delay Timer for ILS4-121-121S & 241 environmental-controllers overheat protectionThe ILS4 triggered switch boxes from Plug 'N' Grow may be plugged into this external timer to delay re powering of the equipment when the power comes back after a brownout or failure. This timer is optional and sold separately. This adjustable timer protects the HID lights which need to cool down before to restart to avoid prematurely burning the bulbs. The timer is also useful to delay the starting of the heating equipment or the air conditioning
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