If it sits in full sun without alot of plants, you'll battle green the entire
season.

It looks great, and the green is letting the fish hide from predators now.
Anything that adds shade will help, lily leaves, water hyacinth (legal in your
area?)
and the uv system will clear it too. Mine cleared in a bout a week. I let
some of the creepers from the garden creep right up and over the rocks into the
water until the lily got up and growing.

Maureen