As water begins to warm up in Spring, Algae begins to bloom and grow at a fast rate. Blanketweed is a form of algae that is very common in ponds and can block filtration and/or pumps if left untreated, as well as some species of fish that can get stuck in blanketweed. Ponds can also begin to look like a 'pea soup' which will begin to grow unless your UV filtration is on with a new bulb (UV bulbs should be changed every 6 months). There are many ways to sort out Algae and blanketweed issue including; treatments, plants, filtration, etc.