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Home > School Of Pool > How To Get Rid of Black Algae
Over the years we've heard plenty of horror stories about black spots in pools. Most often this turns out to be black algae. While some of the other types of algae that can find their way into your pool can be fixed relatively easily, black algae is an entirely different problem. Black algae is most commonly found in concrete or plaster pools and is often found in shady areas.

Black algae can be a chronic problem. Left untreated it may expand during pool season and shrink to a fraction of itself through the winter months. Unfortunately, black algae is tremendously resilient, so there's no easy fix for getting rid of it. Here are a couple of options for treating black algae:Prevent it altogether. This is a matter of diligence for the most part. Some pool owners are always on top of their pool chemistry, but if you're more of a fair weather pool chemistry-type, you'll want to change your ways to avoid the dreaded black algae. Stay on top of your chlorine, ph, alkalinity, and calcium hardness levels at the very least. If you struggle with your chemistry, hit up your local pool store and have them run a professional test for you. This is usually free, and well worth your time. Using an algaecide BEFORE you run into a problem is a great idea. Keep it handy and use it regularly to prevent black algae issues. Another way to help prevent black algae is making sure you have proper water circulation. If you have areas of your pool with stagnant water, algae will tend to move into these areas.

Grab some gloves and start scrubbing. If you're already dealing with black algae (which we'll assume since you're here) you're going to have to get your hands dirty...and you'll probably get some scabs in the process. Black algae creates a protective barrier for itself which is why simple chemical treatments alone aren't enough. Yes, you'll need to continue your chlorine and recommended algaecide use, but you'll also want to get an extremely stiff brush and scrub the affected areas into oblivion. Do this just before adding chlorine. Your scrubbing will help remove the protective barrier and allow your chlorine to get at it while more of the black algae is exposed. ALWAYS use gloves when performing these tasks.