In backyard ponds, hydrogen peroxide is a standard treatment for algae proliferation. Hydrogen peroxide could be an effective natural treatment for algae, mainly string algae on rocks or cascades.
Wheat fibre. Barley fibre is a natural method for combating algae. Straw begins to decompose upon contact with water, and as it does so, it releases peroxides that combat algae. It is a natural chemical agent for combating algae, available in mini-bales or as a liquid extract of barley straw.
Remove decomposing algae leftovers. Add extra aeration. Add beneficial bacteria. Use a rake/eradicator to collect and remove algae.
EPA-approved algaecides can be applied directly to pond water to eliminate algae growth. Copper algaecides are typically the most cost-effective and effective method of controlling algae. Copper algaecides are not suggested in trout, koi, or channel catfish ponds.