Don't empty it if the water is just green.
The green is suspended single cell algae.
Great amounts of fresh water will provide
additional nutrients for algae.

If the water has string algae, floating bits of gooey
algae, then your pond is probably overloaded with
nutrients, then you should clean out the stuff that
is feeding the algae.

Turn on the UV.
Do you have a mechanical filter?

The algae is going to die and the remains of the algae
cells will need to be removed. Sending your water
thru a mechanical filter will remove them from the
water.


kathy :-)
www.blogfromthebog.com
new entry ~ herons!