Description
Sand (silica) in its different forms (sand, silex, gravel) is the oldest natural available granular filtration media. Even today, the use of sand remains popular for the treatment of municipal water in very big open gravity filters, in swimming pool filters and in pressurized filters for the treatment of ground water.
In a lot of groundwater applications the use of sand has been replaced with other granular filtration offering more benefits (faster flow rate, better quality of filtrate, lower in weight, etc.)
Sand is present in nature all over the world, washed and sieved. It exists in different grades that vary from one supplier to another. It is used for the removal of suspended solids, but can also be used to filter of oxidized iron or manganese.
A pressurized sand filter always contains different layers of sand, going from relatively fine sand on top to coarse gravel as a support layer. In between the use of 2 more particle sizes is common.
Guest –
Just what I needed to top some big pots with trees on at a very reasonable price.
Anita –
Nice pebbles, nearly all of them are complete with very few broken in half. Good value as well.
Sally-Jane –
Quality pebbles which a exceedingly suitable for the path I was laying.
Guest –
I bought these to create an edging for a small pathway. Perfect size and more than expected
Paul –
Excellent pebbles for my garden and fantastic service as always from Wickes
Natalia –
Exactly how described. Great price and very decent product.
Gareth –
Nice stones for a pathway, they are large and smooth enough to not hurt bare feet. They also look good.
LORNA –
good size pebbles for my borders and the bags were are good size for me to handle