Dr. Dryden's Activate Glass Alternate Pool Filter Media - Pool Park - Pool Maintenance 

@@nickmenconi8827 To be honest I forget the exact name of it.. My pool supply store said the glass media doesn’t work correctly without it..

Of course the supply store guy said that. What does the manufacturer say? They offer an “enhance” product but no where does it say the media won’t work without it. There are a slew of products to clarify your water regardless of what filter is used. Completely optional.

Thus isn't a glass media anyway; it replaces glass, sand, zeo.

If its a 50 pound filter 25 pound grade 1 25 pounds grade 2