how do yo stop algea in garden ponds?

Answer 1

Need to know what kind of alga...water-born or on walls of pond? If green water, you need to cover about 70% of the surface with ... lily leaves, etc., and the green will start to go away with normal filtration. IF the alga is on the walls, don't worry about it. Add some gold fish and they will eat it. YOu can filter your heart out and the green will not fully go away unless you get a UV filter that is big enough for the size of the pool. I have a large koi pond with tank filters outside, huge pump, and even then, there are times that the water turns green. The UV filter does a lot, but nothing does enough if there is too much sun hitting the water. When my lilies take off, the water turns very clear. Good luck

Answer 2

you cant can you? unless you move the pond out of direct sunlight which would be difficult seeing as though its a pond and lives outside. maybe get some water filtering tablets from the pet shop.

Answer 3

A good filter and pump. Freshwater mussells act as natural filters. plants.Water snails. I have just helped to build a pond and that was wot I was advised to do!!!!!

Answer 4

UV light.. As the water passes through to your filter add a extent ion (UV Ultra Violet).. its like a sun bed that kill the alga as it passes through

Answer 5

Aquarem by Tetra must use lots of aeration with it keep my crystal clear.

Answer 6

Catfish.

Answer 7

Get some water snails.

Answer 8

Stop them doing what?

Answer 9

is to keep it clean and clean it often