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Hard to say as I was measuring the temp using the strips at the front of the GH before, and I'm measuring at the back with the digital now.
Before, if I pulled a shot around 75-80 on the strips by the time I went to pull another the temp would be into the 90s. Now, after I pull, the GH temp will gently decrease and is pretty back to temp by the time I'm ready.
Mines a pre-mil, from what I read the Isolators make less of difference on post-mils.
Thanks - post mil version here.
Did you notice how much it dropped the GH temp? Tempted.