one and the same

Hello I was gonna go aero but have downgraded my current aspirations to ebb'n'flow. Im gonna do a layer of LECA 2 inches thick at the bottome of thpots thw a 50/50 mix of coco coir and perlite. I found thishttp://www.growell.co.uk/clay-pebbles.html would they be ok?

Sorry that wasn't very helpful. Im going with 16 pots unders in a 2 400w or maybe 1 1000w in a 4x4 tray. Basically is LECA a brand or a name for a certain typed of pebble.