I'd skip it if you want to keep the moss. I don't think there's severe
damage @1tsp/gal, but anything more... I had several flats of moss under the
benches when I treated with Physan and got a little browning (maybe areas
that got more drip). But when I cleaned the benches and forgot to move the
flats, the whole flat turned brown - all 4 of them. That was using 1
Tbsp/gal. So I'd recommend doing what Ray said and testing one spot first
with the dilution you're planning on using.
Gary

"danny" wrote in message
...
Does Physan 20 kill moss? I want to get rid of some of the algae in my
pots (and I think a couple have some sort of mold), but I've finally
gotten moss established on the top of a few pots and I want to keep it.
Just wondering if I should skip putting Physan on the ones with moss.

thanks,
danny