The Pond Logic® ClearPAC® without Algae Defense® was designed to end the guesswork of creating and maintaining a healthy ecosystem for those who cannot receive algaecides in their state. The Pond Logic® ClearPAC® solves the issues that so many pond owners face such as: poor water quality, unwanted muck, fish health, and maintaining crystal clear water. Order one from your local dealer today and stop guessing your way through pond management!