Ponds are definitely very beautiful things to have in your backyard. All of those fish and plants add a very nice touch of serenity no matter where the location. However, some things can negatively affect the look of your pond, with algae being the most prominent one.
The problem with algae is that it can be quite hard to control, prevent, and remove, especially when outdoors. However, that is why we are here today, to help you find the best way to clean algae from ponds. We are going to tell you everything we know about this topic so you can keep algae out of your pond.
Table of contents
- Identifying Pond Algae
- A Quick Look at Our Favorites
- The 3 Best Pond Algae Treatments – Reviews 2021
- How To Avoid Harming Your Fish
- How To Get Rid Of Algae In Ponds Naturally
- Other Things To Consider
- Is Your Pond Pump Right?
- Use A UV Sterilizer
Identifying Pond Algae
There are a few different types of algae out there that are normally found in ponds. Some are easier to spot and control than others. However, with these few descriptors, you should be able to properly identify the algae in your pond.
This is probably the most common type of pond algae that you might encounter. This stuff looks like green hair, really thick green hair, that is most often found at the bottom of the pond, usually attached to the substrate, wood, or rocks.
Filamentous algae are known to break off from its place of growth and float to the top of the pond in the form of large green mats.
This is actually also a type of filamentous algae, but it looks a little different. The hairs are not as thick or pronounced as with classic filamentous algae, plus this stuff tends to be a little slimier.
Also, Oscillatoria algae tend to be a little darker in color, looking to be bluish-green or even black. This stuff is well known for giving ponds a black or purple tint.
This type of algae can be a little hard to identify as it actually looks like a plant or pondweed. It is green, leafy, and grows in large pillow-like formations, making it hard to distinguish as a type of algae.
Chara algae will never grow above the surface of the water, it has a really musky scent, and it features a crunchy texture too.
This stuff is also very hard to identify as it is so small that you can’t see it without a microscope. Well, you can’t see it in small quantities anyway, but when it turns the water a pea-green color, plus when it makes the water all slimy on the surface, you will know that you have planktonic algae in your pond.
A Quick Look at Our Favorites
|Best Overall||Aquascape IonGen Algae Controller||
|TetraPond Algae Control Block||
|API Pond AlgaeFix||
The 3 Best Pond Algae Treatments – Reviews 2021
If you want to remove algae from your pond and you want it to happen right now, you might want to check out one of the below products. As far as we are concerned, the below products are all great ways to control algae.
These are in our opinion some of the best pond algae treatments out there at this time, so give them a closer look if you have a serious algae problem.
1. Aquascape IonGen Algae Controller
Now, this thing is definitely quite the innovation in science, which is totally awesome, but we are not about to explain the exact process here. It is quite complicated, not really worth explaining, but it works well.
What is not complicated however is using the Aquascape IonGen Algae Controller. It can be installed right into the main water feature’s plumbing and it just needs to be plugged in for the operation. It’s quite easy to use which is a big bonus as far as we are concerned.
The main point to keep in mind here is that the IonGen Algae Controller is made of a block of materials that include copper ions. This thing releases copper ions into the water which in their own special way help to completely kill algae and stop it from blooming.
This Algae Controller can be used for ponds up to 25,000 gallons, which is very impressive indeed. It comes with a control panel so you can monitor the level of ionization occurring, which is the number of copper ions being released into the water.
We do like the electronic control panel because you can see exactly how much copper is being released and how much time the probe has left before it needs replacement.
Depending on how heavy your algae problem is and what level you have this thing running at, the copper probe could last for up to 3 seasons, but also as little as 1 season. You can set the ionization level as needed depending on how bad the algae problem is.
You should keep in mind that this Aquascape IonGen Algae Controller is best used for string algae control. It works for other types of algae too, but not quite as well.
2. TetraPond Algae Control Block
Ok, so this stuff has a big upside, which is the fact that each block can effectively treat up to 250 gallons of pond water with ease, plus you get 4 blocks in a package.
It takes about a month for a block to dissolve, so for a 1,000-gallon pond, one package would last a little over a month. The big upside we are talking about is that this stuff is great at killing pretty much every type of algae that you might find in your pond.
The TetraPond Algae Control Block is extremely effective at its job. There is just no denying that. Now, with that being said, the main ingredient here is copper, so you will need to test the water regularly. However, that is not the big disadvantage we were talking about.
These things cannot be used in ponds that have live plants. Chances are that the TetraPond Block will kill your live plants.
At the same time, if you fail to follow proper dosage instructions, this stuff could very well kill your fish too.
So, in essence, this stuff is extremely effective in terms of algae control, but can also be dangerous to your fish if used improperly, plus it is not good for plants either way.
3. API Pond AlgaeFix
In our opinion, this is one of the better, easier, and safer options to go with in terms of algae treatment and control. This particular one is a simple 1-gallon container with the dosage instructions included.
All you need to do is add the appropriate amount of API Pond AlgaeFix in terms of the total water volume in your pond every 3 days until the algae problem is fixed. You can then use API Pond AlgaeFix once per week to prevent algae from coming back.
Now, you do need to keep in mind that following the proper dosage instructions here is vital to the success of this endeavor.
If you use too little API Pond AlgaeFix, it won’t work to get rid of all algae. However, if you add too much of it, it can kill your plants and fish, so be careful when using this stuff.
That being said, API Pond AlgaeFix works to kill pretty much every single type of algae that you could ever encounter in your pond, which is of course a big benefit no doubt.
How To Avoid Harming Your Fish
First and foremost, you definitely do not want to harm the fish in the pond when removing pond algae. Luckily, there are many ways of removing algae from your pond without harming the fish living in it.
These are all methods that we are going to discuss in detail below. For now, let’s just make a quick bullet list of all of the fish-friendly ways that you can remove algae from your pond and prevent it from coming back.
- All of the products we have reviewed are totally fish friendly.
- Having a really strong biological filtration unit will remove nutrients needed by algae.
- Making sure that you have a strong filter and an ideal pump helps a whole lot.
- Blocking out sunlight with natural cover helps stop algae blooms.
- Using a UV sterilizer to neutralize UV rays will help a lot.
- Using some kind of pond dye to darken the water will prevent too much sunlight from feeding algae.
- Cleaning the pond regularly and engaging in water changes are both things that help control and remove algae without harming your fish.
- Make sure to not overstock the pond or overfeed your fish, as these are both factors that contribute to algae growth.
- Adding the right pond plants will help take nutrients out of the water which would otherwise be used by algae.
How To Get Rid Of Algae In Ponds Naturally
No matter what type of algae you have in your pond, you are obviously going to want to get rid of it. Now, chemicals and other such algae treatments work just fine. However, you might be concerned about adding any kind of chemical into the pond, which is understandable.
Luckily, there are some natural pond algae treatment methods that you can try. Now, keep in mind that when used alone, these natural remedies might not work that well, but if you use them all together, they should be quite effective.
Clean The Pond
One of the best things to do is to clean out your pond. This means going around with a net and cleaning out any debris that you may find. First and foremost, try to scoop up as much algae as you can. If they are mats of algae or long strings, you should be able to remove a fair amount of them by hand.
Moreover, you should also remove all kinds of rotting plants, dead fish, decaying food, and any other organic matter that is past its prime. Once these things start to decay, they all provide nutrients that algae use to grow. Removing the algae’s food sources will definitely help control it.
Do Not Overstock Your Pond
Another natural way to get rid of pond algae and to stop it from coming back is to not overstock the pond. Fish eat a lot and they produce a lot of waste. So, the more fish you have and the more you feed them, the more waste they will end up producing.
The ammonia and other substances present in fish waste, plus in rotting fish food, is a nutritional smorgasbord for algae. So, keep the number of fish you have in the pond to a conservative number. This way you won’t be providing the algae with too much food.
Regular Water Changes
Perhaps one of the simplest ways to remove algae from the pond and prevent its return is to engage in regular water changes. You can change as much as 30% of the pond water, and replace it, per week.
For one, this will help remove some algae from the water directly. However, the biggest benefit here is that changing the water automatically removes many of the nutrients which algae need to grow.
You could actually use this pond water for your lawn or garden, as it will help your plants grow quite well.
Add The Right Pond Plants
You should definitely have a good mix of pond plants present in your pond (we have covered our favorite plant picks over in this article). First off, you want to have some floating plants, quite a few ones with broad leaves. These help to block out UV light and the sun’s rays, which help algae grow.
Second, you want to have some bushy submerged plants underneath the surface of the pond. Having a few fast-growing plants present in the pond will help to reduce the number of nutrients present in the water which algae require to grow. This is not a surefire solution, but generally speaking, the more of these plants you have, the fewer algae will grow in the pond.
The other thing that you can do to help prevent the growth of algae in your pond naturally is to provide the pond with natural cover. Algae need a lot of sunlight to grow and multiply.
Therefore, if you have a bunch of trees or buildings providing your pond with a fair amount of shade, algae levels will be drastically reduced without a shadow of a doubt. This method is best used with the other above methods that we just talked about.
Other Things To Consider
There are a few other things that you can consider in terms of pond algae prevention and algae removal. Yes, using all of the above methods in combination with the ones we are about to talk about will definitely help to eliminate most, if not all, algae from your pond.
As we said, algae can be a tricky thing to deal with, especially when it comes to an outdoor pond, so using a combination of methods is usually best.
Use Helpful Additives
Using the right additives in your pond can definitely help to control algae growth. Mainly, we are talking about the ones we have listed above. The various algae killers we have reviewed above are quite honestly the best and fastest ways to go about removing algae from the water.
Things like beneficial bacteria can help a whole lot because they remove the food sources which algae need to grow.
One big thing to go with if you want to remove and control algae in the pond is to use pond dye. Pond dye comes in a few different colors including black, blue, and green. All of these help to darken the water and thus block sunlight from penetrating the depths of the pond.
Since pond algae need a lot of sunlight to bloom and multiply, limiting the amount of sunlight that penetrates deep into the pond will help quite a bit no doubt.
Is Your Pond Pump Right?
Another thing to keep in mind here is that you need to have a good pond pump and a good biological filtration unit set up. The pump and filter you have should be able to process the entire volume of the pond every single hour.
Ideally, the more water your pump and filter can process per hour, the better. You want the water to be in contact with the biological filter a whole lot to remove solid debris and things like ammonia which feed algae.
Use A UV Sterilizer
UV sterilizers are quite simple tools to use, plus they are really not all that expensive. We are not going to get into the science of it here, but the important part to note is that UV sterilizers work to sterilize and neutralize UV rays which would otherwise help algae grow.
As you can see, while algae might be quite the problem in outdoor ponds, there is a whole bunch of different ways to remove it and to prevent it from coming back. We would obviously recommend going with one of the products that we have reviewed.
However, using the other methods we have described in combination with these algae killers is what will work the best. The best way to kill and control algae in a pond is by combining as many of the above methods as possible.
Featured Image Credit: Wonderlane, Unsplash