Hi Rob,

You could try floading the pond. Adding
water slowly. Too much too rapidly could be a temp. shock for your fish.
It will move all the grass to the lowest
point where you would be able to net it out easier (or at least closer
together).
If there are fish in the pond you need to add a water treatment for chlorine or
chloramines depending on what your city puts in the water.
Only replace about 20% of the water with the flooding.


kathy :-)
algae primer
http://hometown.aol.com/ka30p/myhomepage/garden.html