How to Get Rid of Black Beard Algae Naturally

Black beard algae can be one of the toughest types of algae to eliminate in your aquarium because it grows so easily, even on glass and other surfaces that are harder to reach than most places where green hair algae grow, like inside filter intakes and pump intakes. Luckily, there are natural ways to get rid of black beard algae, although it may take some time before you see results. In the meantime, you’ll have to do some preparation so that you have all of the tools you need when it’s time to attack the black beard algae directly. Here’s how to get rid of black beard algae naturally.


Black beard algae can quickly spread and take over your tank, and removing it is tricky because it attaches itself to the surfaces of most aquarium decorations. One thing you should know about black beard algae is that it's really easy to transfer, so once you start removing it from one piece of decoration in your tank, you'll want to start cleaning everything! In this post, we'll walk through the process of how best to remove blackbeard algae as well as how to kill any remnants that may have been left behind. What Causes Black Beard Algae?

What is Black Beard Algae

Black beard algae is a type of algae that thrives in an environment with low-light, high moisture, and hard surfaces. It's especially common in mossy or wooded areas. While it's not dangerous for humans or animals, it does pose risks for native species when grown in significant quantities as a result of contamination. 

The best way to remove black beard algae from your home is by picking the turf off the surface with a gloved hand. Sometimes it may be too thick and requires some effort on the individual's part by adding water and peeling away at it. You can also scrub it off if you want to try something different.

Will black beard algae go away on its own

Generally, black beard algae will go away on its own within a couple weeks and sometimes just days. However, if the algae is preventing light from reaching your plants, or you see some white fuzz growing near the surface, it may need help to get rid of the problem. Most cases can be treated with a diluted chlorine bleach solution (1/4 cup bleach per gallon of water). Dilute the bleach in fresh water and apply once every week or two until you notice the problem disappearing. If the fungi persists after 10-14 days, then you'll need to wait for it to pass on its own.

Ways to Remove Black Beard Algae

There are a few different ways you can go about removing black beard algae without chemicals. The first method is to scrub the algae off the surface with a stiff brush, like those for washing dishes. You may also purchase or rent an electric power wash machine, which will give your boat a more thorough cleaning than just using soap and water alone. One of the most effective ways, however, is to scrape it off using long strokes from backside with a razor blade as that removes all traces in one go. Be careful not to cut yourself while doing this!


The first step in getting rid of black beard algae is understanding how it got there. In most cases, black beard algae thrives in aquariums that do not have adequate flow and light. Changing out your filter every month can help with flow; however, if you need additional lighting you may want to consider purchasing a LED hood that provides the optimal levels for the tanks inhabitants. Doing water changes each week will also remove any buildup on decorations or plant leaves so be sure to maintain the gravel for a healthy environment for the fish. Also be sure not to overcrowd your tank as this will cause an excess amount of buildup within time which is detrimental for everyone living inside of it.