ok so I dont know if this is a total coincidence or if its helping, but I thought I'ld post and you can make your own decision. Obviously if you have been following the clam power buy thread you would know a number of clams have died and are getting other clams in the same tank with them sick as well. I lost the PB clam a week ago, I lost my second clam, non related to the PB and had in my tank for over a year and a half. The third clam just about a year and a half old was showing signs of stress...mantel not out very far, closed up durring day and occasional gaping. Yesterday I went to petsmart and picked up some purigen cuz my tank looked a lil crappy after the deaths and water changes only seemed to help a little. Along with adding the purigen I did replace my carbon but when I came in this morning my clam was and still is open very nice! Now I have no clue if the addition of purigen and new carbon had anything to do with this clam looking better or if this clam was indeed sick. I'm simply pointing out the fact that it looks a lot better. Now my question is do the people who have "sick" looking clams that quite possibly have been effected by the PB clams run purigen? I know its not a medicine by any means, but if its sole purpose is to help remove impurities, maybe this is helping the clams regain strength??? I guess try it and see what happens, you can get purigen price matched at petsmart for 6.25 or find it at any lfs. I say if it helps cool, if not, well its still going to clean up your water very nice 
