I just noticed that glutenfreehomebrewing is recommending 1/2 tsp yeast nutrient per gallon in their all-grain tutorial. I know most of us use 1/2-1tsp per batch so I wanted to make everyone aware of that.
https://www.glutenfreehomebrewing.org/all_grain_brewing_tutorial.php
https://www.glutenfreehomebrewing.org/all_grain_brewing_tutorial.php