Expanded Clay Aggregates - ECA filter media ECA is round pellet structure produced by firing natural clay at temperature of 1200°C. The result is a hard, honeycombed structure of interconnecting voids within the aggregate. The particles formed are rounded in shape and generally range in size from 0-30mm; these are processed to the required grading, depending on the final use. ECA is an extremely light weight, strong and thermally insulating material. ADVANTAGES PREVENTS ROOT ROT Another result of increased Oxygen levels and improved drainage is that aerobic (air breathing) bacteria populations remain strong which keep the disease causing anaerobic (non air breathing) bacteria at bay. PROVIDES PHYSICAL STABILITY When growing outdoors with a lightweight media such as coco pit etc., , blending some ECA into the mix will give planters the extra weight they need to resist getting knocked over by wind, rain or small animals. REDUCES WATERING REQUIREMENTS & WATER EVAPORATION By top dressing your pots and planters with a one to two inch layer of ECA evaporative losses are reduced which effectively conserves water and increases the time between watering EASY REUSE ECA can be kept for an unlimited time, without ever changing. Supplied in bags it is easy to use, store, carry and dose. BLOCKS ALGAE AND FUNGUS GNATS A top dressing of ECA also serves to block direct light from reaching the growing media which prevents problematic algae from growing on its surface. This 'dry' top dressing also deters fungus gnats from colonizing your containers with their root destroying larvae. *Environment-friendly *Non-combustible *Natural insulation *Vegetation in the roof can also help prevent UV rays *Very light, yet holds moisture