There are many options available for algae control. Options include chemicals, pond dyes, and natural additives. All can be effective when used properly and at the right time.
What type of algae are you seeking control of?
Filamentous Algae : also known as string algae, pond scum, moss.
Chara : often confused with pond weeds. Growth is bright green and often has a calcified outer coating. Distinct garlic/skunk odor
Planktonic Algae : also known as green water algae. Turns water pea soup green.
If starting algae treatment BEFORE any visible growth appears, the best treatments for all 3 forms of algae are pond dye and good bacteria. Pond dye blocks sunlight from reaching the bottom of the pond where chara and filamentous algae begin growth. Good Bacteria treatments include Muck Remover and Pond Cleanse which consume pond waste that acts as a fertilizer for algae growth.
Algae growth has just started. For growth that has just started at the pond bottom, granular Cutrine Plus is the best treatment option. This not only kills the existing filamentous algae and chara growth, it also controls regrowth for up to 5 weeks.
We do NOT recommend an algaecide to control planktonic algae. Chemical treatment of green water algae can result in a rapid loss of oxygen in the pond. Planktonic algae is a sign of significant nutrient content. To manage this the best treatments are Pond Cleanse and Phosphate Eliminator. Aeration also aids in the reduction of toxic nutrients from water.
Established filamentous algae blooms and chara that are floating at the ponds surface should be treated with liquid Cutrine Plus. This is applied via tank/backpack sprayer. For rapid control of surface algae blooms use the Algae Control Pack which includes a catalyst which accelerates breakdown time in the water.
AFTER algae treatments are applied, apply pond dye to block sunlight from reaching the bottom of the pond. Muck Remover is not only used to break down muck/sludge, it is also applied after algae dies to breakdown the dead waste as it settles to the bottom of the pond.