[jvanvliet]

Originally Posted by jvanvliet

Round spots usually indicate Fungus.

Check for root rot (pythium) along the tree line.

Originally Posted by jvanvliet

I stick with my prognosis until he actually checks the roots for rot.

Round spots from Chlorine damage? Pots with herbicide in them? Maybe, but not likely.

Originally Posted by carbpow

Since my original post I have had a couple of guys check this problem out one of whom is a retired horticulturist. The general consensus is: root rot and a fungus from excess moisture during the period following the placing of the sod. There was no herbicide in any of the pots, ever. The pool chlorine idea they all agreed is possible but as it is a salt water pool and the chlorine maintained on the low end he didn't think it was likely, though possible.

TADA!