Block clean is a powerful algae treatment for keeping growing media free from biomass throughout the growing cycle. It is 100% organic and safe to children and pets.

  • Removes algae
  • No need to remove plants before use
  • Safe to children and pets
  • 100% organic
  • Use with beneficial microbes for best results as the breaking down of the biomass will feed the friendly bacteria!
  • Ready to use spray.