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what does uv light do to pond water

by Aurelie Greenfelder Published 3 years ago Updated 2 years ago
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UV lights work when water from your pond is pumped through their light path. The single-celled, free-flowing algae within your pond water is then exposed to these high levels of ultraviolet light. This light destroys their DNA and kills them.

Full Answer

Do I need an ultraviolet light on my pond?

Ponds add relaxing background sounds to your yard, but these miniature ecosystems need constant water maintenance for healthy fish and plant life. As a solution, pond ultraviolet lights help your water by clearing algae blooms to keep pond water clear. Using a UV sterilizer does have some disadvantages.

What do you need to know about UV filters for ponds?

There are two different types of UV pond filters: UV clarifiers and UV sterilizers A UV clarifier will have the lighter intensity than a sterilizer, removing only bacteria and algae. The UV sterilizers require water to flow much more slowly through them to ensure more thorough exposure, removing parasitic protozoa, like ich , and costia which need that longer exposure time to the UV light.

What does an UV filter do in a pond?

What is a UV Pond Filter? A UV pond filter is a piece of kit that helps to clean up your pond by exposing the water to UV light that helps in the battle against algae that forms. On the following page, you will find out all you need to know about them including – how they actually work and where to install them among many other things.

Is UV light harmfull to fish?

Yes, if exposed to the light, your fish will be harmed. They could go blind. It’s also not wise for humans to stare at a UV light that is turned on. Luckily, all UV sterilizers are sealed units and should not be turned on until after the light bulb is installed and the unit is closed back up and ready to be used.

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How long does it take for a UV light to clear a pond?

How long will it take to clear the pond? Once fully mature, you should notice a difference within one week of turning the U.V.C. on and full clarity should be achieved in two weeks.

Where do you put UV light in a pond?

When it comes to installation, place the UV clarifier where it won't be flooded. It is waterproof, but should never be submerged in water. We suggest mounting it onto a dry flat surface, like the lid of the canister pond filter. And always connect the UV unit to a GFI outlet or circuit to protect against shock.

Does UV light help clear water?

Ultra Violet (UV) light disinfection is one water treatment system that can be used to remove most forms of microbiological contamination from water.

Can you have too much UV in a pond?

You can't have too much UV in a pond because the UV device only affects algae cells that go through the unit. So plants and anything else not suspended in the water are not harmed. However, it's possible to have a device that's too small for the job but you can't have too much UV.

Does UV light stop algae?

By showering algae with ultraviolet rays, a UV sterilizer kills algae the same way it kills other microorganisms. Radiation prevents it from reproducing. Because algae contribute so much to the turbidity of your water, killing free-floating algae dramatically improves your tank's clarity.

Why is my UV light not clearing my pond?

The algae has to flow in front of the UV lights for them to work. This means you'll either need a lot of lights or more than one type of filtration. You pond also has to have the right speed of water flow. If it's too fast the pond UV lights won't work.

Is UV light harmful to fish?

Wild goldfish rely on light from the sun for this, but to expose an aquarium to sunlight would make it the perfect breeding environment for harmful algae. Although generally beneficial, UV light can be harmful in doses that exceed the natural amount of light a wild fish would receive.

How long does UV light take to purify water?

ten secondsHow Long Does it Take UV light to Kill Bacteria in Water? The UV water purification process is quick! As water flows through the UV chamber, bacteria and other waterborne microbes are killed within ten seconds.

How do you install a submersible UV light for a pond?

6:4214:11Pond algae solution - UV light installation - YouTubeYouTubeStart of suggested clipEnd of suggested clipInside is a glass crystal tube. And that's what your light sits. In there's a lot of rubber gasketsMoreInside is a glass crystal tube. And that's what your light sits. In there's a lot of rubber gaskets in here you have to make sure that they're seated properly to create a watertight seal.

How do you hook up a UV sterilizer in a pond?

1:463:16The Pond Guy® Product Video - PowerUV™ UV Clarifier - YouTubeYouTubeStart of suggested clipEnd of suggested clipIt should be placed outside of the pond where it can rest horizontally avoid areas that are prone toMoreIt should be placed outside of the pond where it can rest horizontally avoid areas that are prone to water puddles or areas where the unit can easily fall into the pond.

How do you set up a UV filter for a pond?

3:5531:52HOW TO FIT A POND UV STERILIZER - YouTubeYouTubeStart of suggested clipEnd of suggested clipI'll push those beans out in a minute they slowly sink and get taken down the skimmer box throughMoreI'll push those beans out in a minute they slowly sink and get taken down the skimmer box through the basket and recycle back into the pond as they slowly sink.

Does a pond need a UV light?

This ensures that aquatic life (whether it's animals or plants) are healthy and are able to thrive in their environment. Pond UV lights or UV 'filters' are ultraviolet light systems that have been used for years in ponds and aquariums in an effort to control green water caused by algae.

How do UV clarifiers work?

UV clarifiers, as they are better understood, function as sterilisers because they work simply by killing algae. however, the algae still remain in the water because UV Clarifiers do not remove them. UV lights work when water from your pond is pumped through their light path.

How to get rid of green algae in pond?

When it comes to eliminating green water algae in your pond, UV lights should be the last method you turn to. While pond UV lights work to some extent, they do have a few disadvantages.

What happens to algae in ponds?

The single-celled, free-flowing algae within your pond water is then exposed to these high levels of ultraviolet light. This light destroys their DNA and kills them. The damage caused to the algae’s DNA through this light also causes them to flocculate (clump together).

What are the pollutants in ponds?

As well as other pond pollutants such as sludge and organic matter . The answer is beneficial bacteria. Our pond products use beneficial bacteria that work to digest algae and its source of food. This means algae can be eliminated from your pond and you can control/prevent it from recurring.

Why do we need UV lights in ponds?

Pond UV lights or UV ‘filters’ are ultraviolet light systems that have been used for years in ponds and aquariums in an effort to control green water caused by algae.

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How Long Does It Take for a UV Light to Clear a Pond?

When you have established the UV pond light, you can expect to see a difference within one week. However, your pond might not be algae-free for up to two weeks. From then on, the UV light for pond is going to help you achieve crystal clear water all the time.

What is the best way to control algae in a pond?

UV clarifiers will control the green pond water. You can also control algae based on how much shade you have on the area and ensure that there is at least 50 percent of plants in the water. Clarifiers are usually chosen when you don’t have any animals.

How many volts does a UV light bulb have?

The UV light is designed to destroy any water algae so that you get clearer water with little maintenance and effort. You get one 55-watt UV bulb that can supply between 220 and 240 volts of electricity .

Why do ponds have algae blooms?

If you notice a cloudiness to the water, it’s probably best to get a UV light for the pond. New ponds are more prone to algae blooms because the pond hasn’t matured yet, and this can take many years. Ultraviolet light work because the free-flowing algae pass through it and are exposed to excessively bright light.

What is a UV pond clarifier?

TotalPond UV Pond Clarifier. The TotalPond UV is one of the most popular brands on the market and does a great job of keeping green water away. Use it in ponds that have 2,000 gallons of water or more. Plus, you can install it outside the pond or inside. It is designed to kill free-flowing algae without any chemicals.

How many gallons of water does a UV light sterilizer kill?

This 40-watt UV light is submersible in water and can kill other bacteria, as well. As a UV sterilizer, it works in ponds of up to 6,000 gallons. You can also use it with your filter pump of up to 3,000-gph. The vortex flow rate design makes sure that all of the pond water gets hit by the UV lights.

How does ultraviolet light work?

Ultraviolet light work because the free-flowing algae pass through it and are exposed to excessively bright light. That energy destroys the algae’s DNA, and it dies. Keeping your pond free of algae is the easiest way to enjoy a clear pond. Once the algae die, it all sticks together and gets filtered from the water.

Why is there algae in my pond?

And that brings in a lot of available nutrients. If there are hardly any plants present, then that leaves a lot of food on the table for the algae. And if on top of that the pond is in full sunlight as well, then we have the ideal circumstances for algae to thrive.

How long should I wait to add fish to a pond?

When it comes to adding of fish, I suggest to only add the fish one two at a time, and then wait one month before adding more. Doing it in this way prevents too many nutrients from the fish poo going in the water too quickly. But for ponds without many plants and with a lot of fish, a UV light is most probably recommended from the start.

What happens if you have algae in your pond?

An extreme amount of algae in your pond can cause a lack of oxygen, with possible die-off of the fish as a result. (See this article to know what algae really do to your pond.) So, an action to keep the algae in check is required here.

Is it bad for fish to have a green pond?

And if on top of that the pond is in full sunlight as well, then we have the ideal circumstances for algae to thrive. While a slight green color in the pond is nothing to worry about (and is even healthy), having a dense pea green soup color can be dangerous to your fish.

Can you live without a UV filter?

If your wish is to have a natural looking pond with lots of plants and a few fish, and if you don’t mind your pond to have a somewhat greenish color, you can live without a UV filter.

Can UV light be used for koi ponds?

If you are a koi (or other fish) fanatic and want to have a crystal clear pond with lots of fish and few plants (because plants only hide the fish from view), then a UV light might be the only way to reach your goal. Why is that? Well, an exceptional density of fish in your pond comes with a high density of fish-poo as well.

What does ultraviolet light do to a pond?

Ultraviolet Light inactivates the DNA of free-floating algae and other contaminants that pose a threat to your pond and fish. Bacteria and viruses lurk in your pond, even when your water seems clear. Ultraviolet light eliminates these harmful pollutants. Aqua Ultraviolet cares about your landscaping water needs and the addition ...

What is Aqua Ultraviolet?

For over three decades, Aqua Ultraviolet has been the premier manufacturer of ultraviolet sterilizers and bio-mechanical filtration.

Why is my pond turning green?

Depending on the type of bloom, your water can turn green in color or seem to look green due to overgrowth on the edges, bottom and the rocks lining the pond ...

What type of algae looks like hair?

1. Planktonic Algae: Only individually identified under a microscope, but clusters can be identified visually with the naked eye. 2. Filamentous Algae: This type looks like strands of hair with cotton-like features. Some can be a colorful green and slimy to the touch, while others can look rough like horse hair. 3.

What does a chara look like?

Chara: These are often mistaken for submerged plants and have a rough, crusty texture and expel a musky odor when crumbled. These look like thin branches with spotted or bumpy, forked leave like attachments. 4.

Does ultraviolet light kill algae?

Ultraviolet Light inactivates the DNA of free-floating algae and other contaminants that pose a threat to your pond and fish. Bacteria and viruses lurk in your pond, even when your water seems clear. Ultraviolet light eliminates these harmful pollutants. Aqua Ultraviolet cares about your landscaping water needs and the addition of an Aqua UV Sterilizer will keep your pond clear from algae and your fish healthy!

Is algae good for goldfish?

So, a little bit of algae is alright and it is also a source of nutrition for goldfish and koi” (Pond Clinic, 2013). Keep an eye out though, algae use the Oxygen in your pond to grow and decompose, both which can lead to dangerously low Oxygen levels for your fish. 1.

Where do you place the UV light?

The obvious: The uv light is placed inline with the pump and the filter (either a mechanical or biological filter). The pump gets the pond water to the uv clarifier/sterilizer, and the filter takes care of/removes the dead algae.

What is the sleeve of a lamp made of?

Actually: that’s why the sleeve around the lamp is made of ‘quartz’. Quartz is a material that doesn’t block the uv, thus allowing it to penetrate the water around the sleeve.

What happens when water becomes less green?

When the water becomes less green, there will be less algae to clear out and thus the filter will remain a lot cleaner. You can also use a biological filter. Instead of physically removing the dead algae and other biomatter from the water, these are trapped in a tank that contains beneficial bacteria.

How to get dead matter out of pond?

There are two options: The simplest: you can use a mechanical filter to get the dead matter out. Well, rather, YOU get the stuff out by backwashing and cleaning the filter . In the beginning when you start using the uv light in the pond you have to regularly do this. When the water becomes less green, there will be less algae to clear out ...

What happens when you put a UV filter on a pond?

When water is pumped from your pond through the UV filter, the single-celled algae are exposed to very high levels of ultra violet light. This destroys their DNA and causes the algae to divide. And when they divide, they die, resulting in them clumping together. These clumps of dead algae can then be removed from the water.

Why do you need a filter before a UV light?

A filter before the light traps more sludge, thus slowing down the build up of sludge in the uv light casing. It creates more sludge in the filter itself, but you need to clean that regularly anyway.

How long does it take for a light bulb to produce visible light?

After one year , they might still produce visible light, but it most likely will have stopped producing the UV wavelength, and they will not be doing what they’re supposed to be doing anymore. They gradually decrease in effectiveness. So replacing the bulb every year, will improve performance. (Note: a typical price for a new bulb is around $100.)

UV Clarifiers for Ponds: When to use them and how to pick out the right one

Ultraviolet lights are most commonly used in a koi or backyard pond to get rid of that dreaded green, pea-soup colored water. The pond uv lights are used in a product called UV Clarifiers that kill single celled organisms in water as it passes through the system’s chamber, ultimately serving as an enhancement to a pond’s filtration system.

Do all ponds need UV Clarifiers?

If you have green water and have already tried correcting it with water treatments to no avail then a UV Clarifier is just what the doctor ordered. Not all ponds require UV clarifiers, but they can help clear and prevent green water better than any other product on the market.

How to pick out a UV Clarifier for your pond

UV clarifiers can be purchased separately or as a part of a Filter/UV combo. If you already have a pond and a filter setup you’ll likely want a stand alone unit (unless you’re looking to also replace your filter). If you don’t have a filter yet the Filter/UV combo options are popular because of the all-in-one feature.

Installing a UV Clarifier

Most stand alone units are external inline units, meaning they get installed inline with your piping outside of the pond water. There are a few submersible uv lights for ponds as well.

When to Run UV

Once you have your unit installed we recommend keeping it running 24/7 with just a few exceptions.

What to Expect after Installation

On average, if everything is sized properly and you have adequate shade, most manufacturers state that you should see results about 7 days from the time you turn on your new UV.

UV Clarifiers for the Win

With the proper UV clarifier you can both prevent and eliminate unsightly green pond water. These little lights are powerful agents that allow pond owners everywhere to have crystal clear water and enjoy living the pond life to the fullest.

How does UV light work?

As you may know a UV light works by zapping the water with ultraviolet light. Given this fact the water has to be inside the unit long enough for the given wattage to do this. This is the “dwell time” as discussed previously. In combination with the speed or flow rate of the water and the dwell time, the wattage of the bulb has to be sufficient to accomplish the proper killing of the algae cells. This is why there are different wattage units, of varied diameters and lengths. If the water passes too fast through a given wattage it may not kill the algae cells. The faster the flow rate or GPH the higher the wattage required. So as you can see there are a number of factors to properly sizing the unit. The good news is that most of this calculating is done for you by the manufacturer and the only thing that you need to be concerned with is what your flow rate is of the water passing through the unit.

Why do you need a UV light?

Most UV manufacturers including Pentair/Emperor advertise their UV lights for clearing green water algae and killing harmful pathogens that make your fish sick. This is a little misleading, especially when we are talking about their use in outdoor Koi and Goldfish ponds.

How many watts to kill algae in a 5000 gallon pond?

So as an example if you have a 5000 gallon pond, and a single pump of 5000 GPH or less you simply take 1/3 of the 5000 gallon pond volume which is 1666 gallons, and pick the proper wattage Uv under the Suggested column that is good for 1666 GPH to kill algae! In the case of the chart above you would need the Pentair/Emperor 130 watt Uv.

What is UV sterilizer?

Sterilizer Series UV’s are designed to achieve optimum germicidal disinfection, protecting your valuable Koi against harmful waterborne pathogens.The design of the UV Sterilizer Series is the result of a calculated balance between equipment size, cost and performance; making UV Sterilizer Series the best option for Koi Pond disinfection for smaller ponds and flow rates. The Sterilizer Series are also GUARANTEED to clear green water in 3-5 days if sized and installed correctly!

How to size UV?

Most brands only have one way to size them. This is the full flow method. With this method you have to size the UV based on the flow rate of the pump. If you have a 3000 GPH pump you need a UV rated for 3000 GPH to kill algae.Then all of the water being pumped must go through the unit to do the job properly. So as you can imagine this will usually mean you are forced to buy large wattage, and expensive unit.

How long does it take for a Pentair to clear water?

If you do all that I say here, then Pentair/Emperor guarantees clear water within 3-5 days in most cases.

Do you need a UV light for an outside pond?

So basically put everyone with an outside pond will need a UV light, and this is the real reason to have one. Properly Sizing a UV Light. Many manufacturers advertise their UV lights as being good for a certain size pond. Even Pentair/ Emperor is guilty of this.

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