Earlier this spring my pond became over run with some type of plant. I believe that it may be duckweed, but I am not certain. I went out to my pond one morning. The water was clear and the pond surface was free from debris. Went I went back later that same afternoon, the water was still clear however the surface of the pond was covered in what looked like green pollen. I thought that it was pollen and that after the blooming season this green debris would go away however it hasn't.

That pattern repeats itself almost every day, in the morning the water is clear and the surface of the pond is free from debris. In the afternoon the water is still clear however the surface of the pond is covered in the green debris.

I scooped some of the debris out and it looks like a tiny little plant. It must be dying back every night and then re-blooming the next day. I would suspect that a passing bird has left me this gift. The pond is in central Florida and is in a mix of sun and shade. It contains about 4,500 gallons and I have a 40 watt pressurized UV filter attached to the pump. This is the first time in five years I have had this kind of bloom. We have another pond about 150 feet away and it does not have this bloom.

My plan is to take the fish out, drain the pond and let the sun bake it for a couple of days. My concern is that when I reintroduce the fish into the pond, I donÂt want to reintroduce the plant that was causing the problem. Any suggestions on how to reintroduce the fish while minimizing the reintroduction of the plant?

Thanks.