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<span class="link_user">@Psilocubensis</span>,nutrient solution is maintained at 68°F +/- 1°F. The “cold” from the water inside coils is quickly transferred to and dissipated throughout the solution. Water conducts heat 20x faster than air. :sunglasses:
<span class="link_user">@Psilocubensis</span>, I have an Active Aqua 1/4 HP chiller that keeps a 50 gal cold water reservoir (only for cooling - no plant contact) at 45°F. That Cold Rez supplies all of my various “zones” throughout my grow spaces.
<span class="link_user">@Rangi_Kijani</span>, and which mechanism chill the water? I like to use peltier, but is always good to learn some new technique.
<span class="link_user">@Psilocubensis</span>, thanks very much. I have an Inkbird controller that monitors the temp and opens/closes a solenoid valve for the flow of cold water through the coils :sunglasses: