If you cannot control the green water you may want to consider the addition of an Ultraviolet Sterilizer for your pond. An Ultraviolet Sterilizer will kill all of the algae that pass around the ultraviolet light. These units are sized according to your pump's flow rate and the number of gallons in your pond. You can find the right size for your pond by consulting our Website. The dead algae is then picked up by the filter to be washed away when the bio-mechanical filter is cleaned or broken down by the biological filter.
Filamentous algae is many cells attached together in many forms.
It can be long and stringy. It can be short and furry or in the shape of webs or mats. The short velvet type of algae that covers the liner and everything else in the pond is beneficial. It helps provide a natural appearance to the pond. It uses nutrients from the water, provides oxygen during the day, and the fish nibble on it.