Hi, We live in Plymouth, back up to a marsh, and have compacted clay soil. Our backyard has a turf fungus. 3 or 4 years ago, we had this and did a large drainage project which seemed to help, but we also didn't have extended night temps of 70+ again until this summer. Recent U of MN soil test showed 8.3% organic matter, 0.3 salt, 7.8 pH, 13 & 16 P, 96 K. We have someone core aerate every fall. We're thinking of dethatching and adding 1-2" of topsoil. Should we try to bring down soil pH, too? Any help is greatly appreciated! Thank you!