How to Remove Algae From Lakes

Removing algae from a lake or pond is not an overnight process nor is it an exact science. Different species of algae react differently to removal processes so ridding a body of water of algae can be a painstaking task. There are several things you can do to help limit the amount of algae growing in your lake or pond that have proved to be successful for most common species of algae. This is a good starting point in your process for reconditioning your water.

Do not expect results overnight when reconditioning a lake.
  1. Remove large decaying objects like fallen trees from shallower areas in the pond. Removing decay will limit the amount of nutrients in the water for the algae to feed off. Decaying wood releases nitrogen into the water. Nitrogen is a key food source for most algae.

  2. Plant overhanging trees, bushes and other plants on the shorelines of the lake. Overhanging plants limit sunlight to shallower areas of the pond where water tends to stagnate. You can use weeping willows, puss willows, lilies and any other fast-growing plants to provide shade to the outer edges of your lake or pond.

  3. Break up barley straw, place it in netting and submerge it into your lake. According to Purdue University, if used in large enough quantities, barley can have a positive effect on resolving algae blooms. The suggested ratio for barley to water is 225 pounds per one acre of water.

  4. Install equipment like skimmers and fountains to aerate the water and to create movement. Water movement exposes more water to oxygen. This helps to get oxygen to deeper parts of the lake that are starved for oxygen. The more oxygen you have in your lake the less phosphorus and nitrogen in the water. Both are key food sources for algae.