I've dug up 1 sq ft of grass along with roots & soil and took the sample to a reputed Nursery near my home. An 'expert' saw the grass under microscope and googled brown patch and said it must be brown patch. He advised me to apply "BAYER ADVANCED FUNGUS CONTROL FOR LAWNS READY-TO-SPREAD GRANULES II". I've asked if its dollar spot or melting out as you've suggested. He said either way "Bayer Advanced" will work. I've spread the granules today morning. However after doing more research, looks like its more of melting out and/or dollar spot. You have recommended heritage G - but looks like Heritage G is ineffective and clearly doesn't work for Dollar spot. http://commodities.caes.uga.edu/turfgrass/georgiaturf/publicat/PCRP2011/Turf%20Disease%20Control.pdf I understand I would have to rotate the fungicides every other application. What are couple of broad fungicides in different groups that can cover brown patch, melting out and dollar spot.