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Hello nature lovers..!!!Here are amazing gifts for you ,on the purchase of Radha Greens products....."Morning Glory Seed/Bulbs absolutely free of costSo hurry up...Offer is for limited time...LECA balls, or Lightweight Expanded Clay Aggregate balls, are a type of lightweight, porous, and granular material used in gardening, hydroponics, and various construction and horticultural applications. They are created by heating and expanding clay pellets to create a highly porous and lightweight aggregate. Here's a description of LECA balls and their common uses:Appearance and Composition:LECA balls are small, rounded, and lightweight, typically ranging in size from a few millimeters to a few centimeters in diameter. They are usually reddish-brown or tan in color, although variations may exist based on the source and manufacturing process.These balls are composed of expanded clay, which is a natural material derived from clay minerals. The expansion process involves heating the clay pellets to temperatures of approximately 2,190°F (1,200°C) in a rotary kiln, causing them to puff up like popcorn due to the release of water vapor and gases trapped within the clay particles. This expansion creates a honeycomb-like structure with numerous tiny air pockets.