Our lightweight expanded clay aggregate products are used in a massive range of industrial, commercial and domestic applications. Please do not hesitate to contact us us if you require help with your specific application - there is a good chance that our products are already being used for something similar.     AlfaCoral looks just like real coral. Suitable for marine and fresh water, it looks great and helps improve water quality.   AlfaGrog is the choice material for biological filtration systems. It is equally effective as aquatic decorative gravel, often used alongside AlfaCoral to stunning effect.           From plant decoration, benching and crocking to soil aeration, drainage, weed suppressing and much more.   Ideal to produce that traditional BBQ flavour. Clean and lightweight they are suitable for all gas and electric BBQ's.           The cellular nature of Alfa Expanded Clay Aggregate makes it extremely light and provides inherent fire resisting and insulation properties.   Alfa expanded clay is an efficient and lightweight aggregate with outstanding fire resisting and insulation properties.