Gardening pro explains why your patio slabs are brimming with green slime algae - how to remove it
![Gardening pro explains why your patio slabs are brimming with green slime algae - how to remove it](https://i2-prod.mirror.co.uk/incoming/article32631153.ece/ALTERNATES/s615/1_Bricks-Walkway.jpg)
Guy Barter, a cleaning expert from the Royal Horticultural Society, has explained why your patio slabs are covered in slimy green algae this Spring - and how to get rid of it for good