It is manufactured by Cannon Packaging Co. out of Humbolbt, TN. I called and tried to get some info on the product and they told me the company is owned by a co-creator of Perfect Pond. A few years ago this person left Perfect Pond and started making his own which is Pond Pro. They said he addded a micro pack to the formula and it should be even better than Perfect Pond. Does this sound accurate to anyone? I purchased 4- 25# boxes that the instructions say should be applied at 6 lbs. per acre. I paid $39.00 a box. I can't remember what I paid for Perfect Pond, but I think it was over $50.00.