TetraPond Pond Blocks will help keep algae out of your pond! Pond Blocks are an easy, effective method of ornamental pond algae control. Simply drop into your pond regularly to restrict algae growth and help keep your water clear. Buy in bulk to save even more on your regular algae treatment!
Keep pond algae under control and pond water clear! TetraPond Pond Blocks make effective algae control as simple as tossing in a block into your pond once a month. These pond blocks also help clear cloudy water and controls algae in ornamental fish ponds, water features and water fountains.
Note: NOT recommended for ponds or water gardens with live plants.
Directions: One block treats up to 250 gallons for 30 days. Use only as directed.
Copper Sulfate Pentahydrate - 1.02%
Diuron [3-(3,4-dichlorophenyl)-1,1-dimethylurea] - 0.51%
Other Ingredients: 98.47%