This filter sand is one of the two filter media needed for pool water filtration. Filter sand should always be added to the sand filter after adding the filter gravel.
If you have a Triton TR40 filter, you should add two 25 kg bags.
If you are using a TR60, you add 100 kg of filter sand (= 4 bags).
If you have a Triton TR100 filter system, you should add 200 kg or 8 bags of filter sand.
After adding the filter gravel, you should add this filter sand with grain size of 0.4 to 0.8 mm. This will ensure ideal filtration of your pool water.