I had not seen that one on RC... I'll take a look, just out of interest.
The surge device (dump bucket, most often, though I have found some other implementations) does seem to be the biggest issue. Actually, among the things I am trying to find out is why it must use a surge device. I know the algae is a specific type or types of turf algae, but not sure of the why's on some of these things.
Thanks!
-Mike