While the products from TLC are excellent, I now WOULD NOT recommend dealing with www.poppopsfish.com for anything at all, as he just ripped me off.
I paid him $24 on July 4 for a gallon of an aquarium optimizer which I had sampled in my tank. It is a wonderful product, reduced poo almost like magic instead of seeing it on the tank floor before WCs. It was never received, then I was told it would ship on July 15 via UPS. It did not ship, I never received the product, and John (poppop) has not had the courtesy to respond to my inquiries when I asked for a tracking number, or asked what's happened to my product, or even when I filed a case with PayPal. www.poppopsfish.com has even REMOVED their contact phone number from their website, which indicates to me that he's done this to a number of people. Of course, he has NOT returned my $24 either. He seemed very nice, but I guess it was a false face he put on.