That water looks really nice - I hate you!
The spring water advice is not the best. Do you know what the mineral content of that spring water is? If you don't, save some money and use your own water, but remove the chlorine/chloramines if it has those. Some spring waters look about like your water, some are loaded with minerals.
You might get the Sulfates and Chloride up to about 100 ppm each for starters. If you want a sharper bitterness that lingers, up the Sulfates and drop the chloride from that.
Read the Bru'nwater page and knowledge section. If you download the sheet you can look up the yellow-bitter profile.