It will be the same brand, since the mountain of bags at the dollar store has not shrunk since I bought one last summer. Even though it will be the same (brand and batch), I can't place much stock in the "science" of whether or not it will help. Let's face it, I am not using "Koi Clay" and its "special formulation. . ." just a cheap source of bentonite clay. Who knows what trace minerals are present or lacking from batch to batch, let alone the ramifications on any given pond environment. The best answer I can expect is something along the lines of "Does bentonite clay APPEAR to have an effect on my floating scummy stuff?" "Does bentonite clay appear to have a local effect on string algae?" If it seams like it does curtail the floating stuff or I see diminished string algae growth near where the clay was added, then I get to play around with it next year. . . In the end, it is still just anecdotal evidence.