Thanks for the reply V66,
a few garden stores around here (forgot about them in the Bunnings/Mitre-10/Home advertising whitewash, would you believe!) so I'll have a look. Big turf place (Canturf) too, can always ring them I suppose. And of course, can always ring head office.
In the meantime, is applying Seasol/powersol of any value to grass?
Thanks