Not sure how well the bacteria works either but I am applying a product knows as "BioClean" that I got from Stoney Creek Equip. Company. A five gallon bucket retails for about $259.00, but I got it for $80.00 in a silent auction at a Michigan Aquaculture Meeting.
See this link for the product:
http://www.stoneycreekequip.com/form/bacterialarge.htm