Here's the madder in the pot on the wood stove. I heat the pot in the morning to about 120F and then take it off the stove and let it sit for 24 hours. The madder is in a bag in the pot with the yarn and every time I walk past I squeeze the bag. Our water is full of calcium, magnesium and other minerals. It is pH 7. It should give good reds but I only seem to get burnt orange. This morning I added calcium carbonate (chalk) to the vat. This is day 5.