Does it matter which gravel material I use under Pyrolox or Filox and calcite filter media?
One dealer feels 1/8 x 1/4 gravel or 8 – 12 mesh garnet will work just fine under Filox or calcite.
The dealer outside town said I must use #8 garnet under Pyrolox, and I may not need anything under the calcite as my filters are small, (10” dia.) He feels 1/8 x 1/4 gravel is for water softeners.
Both dealers will sell me whatever I want at about the same price.
Is there something like a “Best Practice” when it comes to under bed materials?