Here in N Texas DFW area we have hard as heck clay soil. Bermuda growns in it but barely. Its so thin, weeds germinate easily. Im going to aerate but this seems a temporary solution. As soon as the clay gets soaked it would seem the holes will just close again and your stuck with compacted clay again. i think im going to aerate, then spread pulverized gypsum, then topdress with a mixture of topsoil and manure to get some decent soil in there for the grass to grow in. Hopefully filling in the holes slightly with good soil and keeping those airways open with some good breathing soil. Any other theories???