Where to buy Dr. Dryden's Active Filter Media in U.S. / Boston Area

[rmill9681]

Hi,
Some of the good pool guys on youtube recommended dr dryden. I can't seem to find a good place to buy it in the U.S. The sites that come up with it on google search have shady names or I've never heard of them. Any recommendations? Need 3 course, 9 fine.

 

[proavia]

Just use regular pool filter sand.
You aren't going to see any difference when using some magic "active filter media" alternative - except that your wallet will be much lighter due to the much higher price.