I used DT's until the LFS discontined it. It's OK, but I found nothing special about it. Certainly not a "porche". After speaking with the owner of the co. out in Ill. I wouldn't use the stuff if you paid me! He was rude and really didn't care that I liked his product, nor that I wanted to continue to use his product. He made no offer to point me in the right direction where to purchase his product. He is only interested in distributors who can buy a ton of the stuff at a time. Not the little guy who buys the junk from the distributor! I have a bottle of Marine Snow I intend to use after I'm done with the DT's (should be this week). So, I'll see - the locals swear by the MS.