Sinclair Silverperl Hydroleca 8-16mm [50L] (36/P) - Each

Hydroleca A lightweight clay aggregate formed by special clay minerals expanded at a high temperature producing ceramic "pebbles" with a smooth outer crust and a honeycomb interior. These pebbles are sterile, non-toxic, inert, resistant to algae, extremely strong and can absorb up to 40% of their own weight in water. They are not damaged by frost and have good insulating properties.