How to use the calculator

1. Enter the diameter of the filter in meters
2. Enter the depth of filter media, this is usally 1 to 1.2m bed depth
3. Click anywhere on the table, and the number of 25kg bags of AFM and grade of AFM will appear in the far right column in RED

4. If you do not know the size of your filters, there may be a label on the side that tells you the weight of sand.
enter the weight of sand and then click anywhere on the table, the amount of AFM will be given in the far right column
Please fill all required fields
    Filter diameter meters Filter bed depth meters Replace the 2m with you filter diam in meters, and 1.2m with the filter bed depth in meters. AFM filter media
      25kg bags
      top layer Grade 1 =
    For filters under 1 metre in diameter you may just use AFM grade 2 and grade 1, add the G3 quantity to the G2 middle or bottom layer Grade 2 =
    bottom layer Grade 3 =
     max 40 x 25kg bags to a pallet  Total
    Weight of sand Kg If the weight of sand is shown on the label, then replace the 1000kg number with the weight of sand to calculate the 25 kg bags of AFM required for your filter  
     top layer Grade 1 =
      middle or bottom layer Grade 2 =
      bottom layer Grade 3 =