If you are planning to pick some up during your trip to Madison, the only place that has it is Aquarium SuperStore on Gammon Rd, you have to ask for it as they keep it stored in the back room.

Like Angel said, we've seen great responses from everything since we started feeding it. Wish I could remember who it was that recommended it to us so we could try to return the favor. My great idea of growing our own cultures didn;t pan out so well. Easier just to buy a big bottle of DT's when ever needed right now.