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.
Sandra –
Excellent pea gravel , wouldnt hesitate to use itFor garden path ways , good size and very economic
Guest –
Great value product. Most of the stones were about an 3cm. Some were larger.
Dave –
They look really good around are garden borders, just what we needed.
Martin –
These pebbles look great in the gardenVery impressive for the price
Edward –
You get a bag full of river pebbles that are an inch or two across. Good value for the amount supplied
Maria –
Excellent product but absolutely rubbish service
Guest –
Good product, looks great in the space I had for them, look really spoton after they had been washed.
Guest –
Perfect for the gardening job I needed to complete
Roger –
Excellent value. Look great. Have purchased before several times.
Jane –
Ideal for filling path, great price, yes need rinsing but well worth it