How To Get Brown Out Of Pool Water? [Answered!]

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If you are reading this, I assume that you either live in or around a water body. I also assume that you have at least one pool in your backyard. I would like to introduce you to a bug that has been causing me some trouble recently. It’s name is “brown algae bug” and it’s also known as the “cordyceps bug.” This bug lives in and around freshwater bodies and it’s eggs are a natural part of the spring bloom. I’ll discuss how you can prevent them from entering your pool water and causing all kinds of problems for your fish and for you.

What Is Algae?

Algae is just what it sounds like. It is a type of seaweed that grows on or inside of plant stems or pieces of wood. Most algae are not harmful to humans or animals; in fact, many are edible. However, some types of algae are harmful and can cause problems when they get out of control. This type of algae is usually green and many people confuse it with food when it is growing in ponds or lakes. Sometimes it can even be found growing along the coastline. Harmful algae include, but are not limited to:

  • Choke algae (no, not that kind lol)
  • Piranha Stalks (seriously though, these have sharp teeth)
  • Red Tide (eww)
  • Waverunner Algae (aka Jellyfish Algae)
  • Candling Algae (my personal favorite because it looks like a hagridden witch or spirit)
  • Blooms Of Serpents(seriously though, have you ever seen the ocean during a blooming tide? Very cool! I’m not kidding, I love watching the ocean during a blooming tide!)
  • The list goes on and on… and on. Most notably, algae feed on dead or decaying matter and some can accumulate toxins that are harmful to living creatures. The above types of algae can accumulate toxins such as heavy metals like mercury and cadmium. If these toxins accumulate in their bodies, they can cause problems such as:

    • Damaged organs (e.g., the liver)
    • Mental retardation (in children)
    • Increased susceptibility to disease (e.g., diabetes)
    • Hereditary disorders (e.g., gout, haemoptysis)
    • Revemation (choking)
    • These are just some of the more serious problems that can arise from consuming a diet of algae. If you suspect that your pool water may contain toxins caused by algae, then you should take precautionary measures to remove it. These measures include:

      • Testing the water for toxins (most pools have a testing kit for this)
      • Adding gravel to the bottom of the pool (prevents large amounts of organic matter from degrading)
      • Familiarizing yourself with local ordinances regarding water bodies (i.e., what is and isn’t allowed)
      • As you can see, removing algae is a long-term process that requires dedication and persistence. Unfortunately, not everyone is willing to commit the time and effort required to keep their pool clean of algae. That’s why it’s important to do so at the first sign of trouble. The earlier you catch the virus, the easier it will be to treat it. With the right medications and strict adherence to a healthy diet, you’ll be able to keep the brown algae off your pool deck and off your fish tank- and that’s what’s important!

        A More General Discussion About Algae

        If you’ve been living under a rock in recent years, then you may not know that many people are against the use of pesticides and other chemicals in general. Some people even go as far to say that these chemicals are harming the environment and that we should try and live a ‘greener’ lifestyle. One of the most famous proponents of going green (and for the record, I agree with him wholeheartedly – it’s just unfortunate that most people don’t seem to share his views) is Mr. Edward James Oliphant who popularized the quote, “Pesticides are poisons, and poisons are slowly killing us.”

        Since algae is not really something that you’d want to eat, you don’t need to be as worried about it accumulating toxins in your pool. The toxins that it does accumulate are generally harmless and they break down fairly quickly once they’re removed from the water. Still, the point remains that you don’t want to introduce toxins into your water source. One of the best things that you can do for the environment is to keep your pool clean. This way, you’re not contributing to the problem, you’re actually helping to solve it!

        Why Are Algae Bugs Confined To Ponds And Lakes?

        If you’ve ever taken a stroll down a country lane or a quiet suburban street on a warm summer’s day, then you may have noticed that ponds and lakes are the perfect breeding grounds for algae. Ponds and lakes are typically small bodies of water and they lack the oxygen found in oceans and larger bodies of water. Without much oxygen, the waters of ponds and lakes tend to become quite murky and this makes it difficult for fish and other underwater creatures to survive. As a result, most fish and invertebrates are not seen as a part of domestic livestock and therefore they aren’t eaten by people either.

        Since most fish and invertebrates don’t eat algae, they’re not affected by it in the same way that larger animals are. It is only when algae blooms enter the food chain that problems arise. Harmful algae can accumulate toxins that are harmful to even the smallest of living creatures. So while it’s not really a problem for humans, it can be a problem for companion animals such as fish, amphibians, and reptiles. This is why most states and local authorities do not allow livestock to drink from or swim in any body of water that contains harmful algae. This also means that the presence of harmful algae in your pool means that it’s probably not a good idea for your fish to drink from it either.

        How Long Does It Take For Brown Algae To Colonize Ponds And Lakes?

        The short answer to this question is: it depends. Some algae quickly colonize ponds and lakes while others take quite a bit longer to establish themselves. Generally, it takes about a year for algae to colonize newly emptied out ponds and about two years for lakes. So if you’re emptying out your pool every few weeks or so, then you’ll notice that the problem will eventually go away. The other thing that you can do is to add more water to the pool which will help to keep the algae at bay. Remember: the more water there is, the more there is for everyone. Even little fish need water to live in. So don’t worry, your problem will eventually go away as long as you keep up the good work!

        Where Do I Find Chemicals That Can Be Used To Kill Algae?

        If you’re looking for chemicals that can be used to kill algae, then you’ve come to the right place. This blog post will discuss some of the most reliable and effective chemicals that are available to be used for this purpose. Keep reading for more information.


        Chlorine is an element that is commonly found in pools and it is an excellent chemical that kills algae and other organic matter fairly quickly. The general rule of thumb is the more chlorine there is, the shorter the algae’s lifespan will be. Chlorine is mostly effective when used in combination with another chemical such as iodine. Iodine is a chemical element that is closely related to chlorine and it has very similar properties. One of the most reliable sources of iodine is kelp which also happens to be edible. Just make sure that you don’t confuse the iodine in kelp with the synthetic kind that you find in stores. Synthetic iodine is extremely poisonous and it can cause serious damage to your health.


        Bromine is another chemical agent that is used to great effect in killing algae. It works by blocking the algae’s access to nutrients so that it eventually starves to death. Bromine is a very effective chemical, but it is also readily available and relatively inexpensive. As a result, it is commonly found in household products and antifouling paints. It is most effective when used in combination with chlorine or with another very aggressive chemical such as glufosinate (an ingredient in Wolverine that prevents grass from growing beneath it).

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