Home Slow sand filter Slow sand filter The sub-angular to rounded grain shape, petrological composition, high silica content and cleanliness make our sands ideal media for water filtration. Contact us - Garside Telephone 01525 237911 Email garside.sands@aggregate.com SlowFil Garside sands A specially blended clean washed sand specifically produced for use in Slow Sand Filters. Information available on request. Aggregate Industries provides the base for Aberdeen FC development Aggregate Industries helps sport pitches stay high and dry with pioneering new infill sand Garside sands throws its weight behind Greensand Country's 'first ever' festival Garside Sands goes the distance in grueling charity cycle Ross County FC The Kelpies at Helix Park Ramside Hall Golf Course The Tractor Boys choose Garside Sands again