I have been reading that the ideal grow environment temp is between 68-77F with an ideal of 73.4. If we are around 74 in the grow box wouldn’t that also increase the water temp to near 74? Inside the Grobo there isn’t much separation between the grow environment and the water reservoir so eventually the water will match the temperature of the grow box ~75. Leave a glass of water in any environment at any temp and it will eventually match that temp.
I’ve read that water temps higher than 72 can be harmful to the roots and cause root rot. Without introducing a water chiller, how are we to keep the water temp at the ideal temp range of 64-67 while at the same time maintaining the ideal temp range for the grow environment which is much higher?