Combine active starter with the water in a mixing bowl. Mix well
Add the flour. Mix until combined
Add in the sea salt and other 50 grams of water
Cover and let rest 30 minutes
Knead for a few minutes
Cover and let sit 30 more minutes
Do this another 4 times(knead and rest 30 minutes)
On the final knead let the dough rest until double in size
Transfer dough to counter and cut in half
Square the dough up and then roll it up
Push the rolled dough first, then follow by pulling it towards yourself, giving tension.
Do the last step a few more times to both halves of dough
Let rest for 30 minutes uncovered
Do the push and pull one more time. Place both halves in 2 seperate baskets. Cover
Transfer baskets to fridge and cool for 2 hours
Place loaves in iron pot in oven
Cover and bake at 450 for 30 minutes