Using a kitchen scale, measure 325 grams of filtered water and 175 grams of active sourdough starter into a large bowl. Mix well with a whisk or a fork.
Add in the whole wheat flour, salt, and 1 tablespoon of honey. Mix the dough together with wet hands or a dough hook. The dough will be stiff and shaggy.
Knead the dough by hand or with a stand mixer for 5-6 minutes, until the dough comes together in a smooth ball and feels like play dough. Cover the dough with saran wrap or a damp tea towel for 8-10 hours or until double in size.
Line a baking sheet with parchment paper.
When the dough has doubled, dump it onto a lightly floured work surface. Divide the dough into 8-10 equal portions (I use a scale to weigh and divide mine). Roll each piece of dough into a ball and set it on the pre-lined parchment paper. Cover and let rest for 20 minutes.
Create a bagel shape by picking up a dough ball and sticking your thumb or index finger through the middle of it. Gently stretch the dough outward in a circular motion to create the bagel shape. Set the bagels back on the baking sheet and cover. Let dough rest for 40 minutes.
Preheat the oven to 425 degrees F. Bring a large pot of water to boil and add in one tablespoon of honey.
Add 2-3 bagels at a time into the boiling water with a slotted spoon. Boil for 30 seconds on each side. Set each bagel back on the parchment paper.
Bake for 25-30 minutes or until the bagels are slightly golden brown.