Drydan Aqua Glass Sand Filter Media
Drydan Aqua Glass Sand Filter Media is also referred to as DGS
DGS is a filtration media made from 100% recycled glass in Dryden
Aqua’s ultra-sophisticated glass factories. In contrast to AFM®, DGS is
made from mixed glass and it is not subjected to any activation process.
Nevertheless, DGS allows ultra-fine purely mechanical filtration while
suffering a lot less from bacterial clogging than sand. Like AFM®, DGS
is produced in strict compliance to ISO specifications and undergoes
a unique washing process using 100% rainwater to become the best,
safest and purest non-activated glass media on the market.
The glass is washed using 100% rainwater, decontaminated and carefully
broken to the appropriate particle shape and size. Above all we make sure no
dangerous glass splinters can get into the filter material and that the organic load is below 100g per ton. Other glass media have a contamination between 500g and 10‘000g per ton.
Key Benefits of Drydan Aqua DGS
- Clearer water and reduced chemical consumption: DGS removes up to 30% more particles than sand.
- Less chlorine smells: DGS reduces the formation of trichloramines in
the filter for a healthier atmosphere in swimming pools. - Less backwash water: DGS needs shorter and slower backwashes than
sand (240 seconds to evacuate 99% of retained particles at 45 m/hr). - Stable performance and longer lifespan: DGS has less efficiency loss
over a complete filtration cycle and 2 times greater longevity than sand.
DGS Grades
DGS comes in different grades depending on the application:
- DGS Grade 1 – 0.30mm – 1.00mm.
- DGS Grade 2 – 0.80mm – 2.50mm.
Use 60% of DGS Grade 1 and 40% of DGS Grade 2..
15% less DGS compared to sand is required due to the difference in
specific weight. Bulk bed density = 1’250 kg/m3.
To replace 200kg of sand you will only need 170kg of DGS.
Top layer: DGS Grade 1 (grain size 0.3 to 1.0 mm) = 100 kg (60%).
Bottom layer: DGS Grade 2 (grain size 0.8 to 2.5 mm) = 70 kg (40%).
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