algae in the water
Photo by Mihály Köles on Unsplash

How to Remove Algae From a Pond Without Harming Fish

There are numerous methods available for eliminating algae from a pond without harming fish. But before you get started, it’s essential to understand where pond algae comes from and why it could be detrimental.

Algae are an integral part of aquatic ecosystems, but too much growth can lead to chemical buildup that will make your pond toxic for fish and other creatures. On the contrary, a healthy pond that’s free from algae growth can be an idyllic haven for all types of wildlife to flourish in.

If your fish pond is overgrown with algae, one way to control it is by eliminating excess nutrients that encourage it. These include nitrates, phosphates, macro and microelements.

To reduce these nutrients, you can utilize a pond filter and pump to circulate the water and eliminate excess. This will stop nitrates and other pollutants from entering your fish tank as well as reduce organic material in your water.

algae photo above the water
Photo by Jordan Whitfield on Unsplash

Another option is using a pond water clarifier that uses UV light to kill off algae cells in the water. This is an efficient and secure way to keep your pond clear and healthy.

Plants: They Fight Algae in Three Ways

One of the best ways to combat algae is adding plants to your pond. Plants create shade, cutting down on sunlight that reaches the water’s surface. Furthermore, plants use all those nitrates and phosphates algae consume as fertilizer – an especially efficient strategy when your pond has high nutrient levels. This makes for effective control of algae blooms.

Other methods to combat algae growth include using blue or yellow dye, which will give your pond a vibrant hue. You could also place floating aquatic plants on the surface to block out sunlight and shade it out.

There are also naturally occurring bacteria that can help combat these effects. These beneficial organisms will consume any excess nutrients in your pond and convert them to harmless gas.

Some people opt to manually scoop algae out of their pond with a net. Alternatively, manual labor and/or hiring a weed eradicator may be sufficient if your pond is large enough.

algae focus photo
Photo by Lasse Møller on Unsplash

This method can be highly effective, though results may take some time to manifest. To guarantee successful outcomes, keep a close eye on your pond to prevent algae reoccurrence.

Barley Straw – Another effective method for controlling algae in your pond without harming fish is using Barley Straw. You can buy it either in liquid form or pellets that you simply pour into your pond.

Barley straw breaks down in water and releases something similar to hydrogen peroxide, which is highly effective at eliminating pond algae. Not only is it safe for fish but can also be used during the winter months when other treatments are ineffective.