Clear Water Aquarium II

 This updated frequencies has sine wave 843 Hz added, to destroy Baker's Yeast,

Clear Water (Mold Fungus Algae Sewage Fungus Baker Yeast) II

and if yeast is of particular problem,

Most Effective Yeast freq 464 Hz

and updated Baker's Yeast,

Baker's Yeast 775 843 Hz

all for a clear tank of water.