Pumice granules

[malvasia]

Does anyone know where you can buy Pumice granules here in Tenerife. They should be readily available as it is volcanic rock.
Thanks.

[canarybird]

You should get them at any garden center, by the sack or truckload as they are used as mulch for landscaping here.
Called picón, they come in dark reddish brown (the cheaper variety) or black.

[malvasia]

Thank you, I will have a look.