UV sterilizers vs Algae - The Planted Tank Forum
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post #1 of 10 (permalink) Old 11-13-2015, 12:30 PM Thread Starter
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UV sterilizers vs Algae

Are UV Sterilizers (such as the ones that come in the SunSun filters) effective in limiting algae growth? Or is this just a "gimmick"?
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post #2 of 10 (permalink) Old 11-13-2015, 12:51 PM
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I think they do a very good job on algae that spends its time in the water (green water algae) but are less effective against the algae that clings to surfaces. If the spores of these types pass through the UV, good. But if they cling to something before the water circulation brings them through the UV, then the algae can grow. Might slow down the spread, though.
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post #3 of 10 (permalink) Old 11-13-2015, 01:10 PM Thread Starter
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Originally Posted by Diana View Post
I think they do a very good job on algae that spends its time in the water (green water algae) but are less effective against the algae that clings to surfaces. If the spores of these types pass through the UV, good. But if they cling to something before the water circulation brings them through the UV, then the algae can grow. Might slow down the spread, though.
Thanks, Diana! I would think some help is better than no help.
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post #4 of 10 (permalink) Old 11-13-2015, 01:46 PM
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Never used one in an aquarium, but have found them highly effective at taking care of 'green water' in a pond.
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post #5 of 10 (permalink) Old 11-13-2015, 02:22 PM
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They work but as stated by "Diana" ...they get the suspended stuff best. I had a bit of a start of greenwater in my shrimp tank...I switched on the UV in the SUn-sun and in 2 days it was gone....and right next door in a 40 planted, the greenwater abounds and I , stupidly, had purchased the sun sun without the UV and now I am doing water changes and letting it go dark until it clears up.....

also- we have a big koi pond in our backyard that absolutely can not exist without a UV as it gets direct sunlight for a good part of the day.

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post #6 of 10 (permalink) Old 11-13-2015, 02:47 PM Thread Starter
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Originally Posted by Kubla View Post
Never used one in an aquarium, but have found them highly effective at taking care of 'green water' in a pond.
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Originally Posted by bsherwood View Post
They work but as stated by "Diana" ...they get the suspended stuff best. I had a bit of a start of greenwater in my shrimp tank...I switched on the UV in the SUn-sun and in 2 days it was gone....and right next door in a 40 planted, the greenwater abounds and I , stupidly, had purchased the sun sun without the UV and now I am doing water changes and letting it go dark until it clears up.....

also- we have a big koi pond in our backyard that absolutely can not exist without a UV as it gets direct sunlight for a good part of the day.
Ahhhh....well, it looks like they can be beneficial to some degree. Thanks for the input @bsherwood and @Kubla.
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post #7 of 10 (permalink) Old 11-13-2015, 03:34 PM
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UV's work very well on any algaes that you can get to be free-floating in the water column, and that they can trap - e.g. green dust algae; hair algae, or BBA, that you can remove from plants & décor so that they're free-floating & can be attracted to pass through the UV.
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post #8 of 10 (permalink) Old 11-13-2015, 05:15 PM Thread Starter
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UV's work very well on any algaes that you can get to be free-floating in the water column, and that they can trap - e.g. green dust algae; hair algae, or BBA, that you can remove from plants & décor so that they're free-floating & can be attracted to pass through the UV.
Do all algaes pass through the water column at some point?
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post #9 of 10 (permalink) Old 11-13-2015, 05:39 PM
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Do all algaes pass through the water column at some point?
No, their growth can begin on a number of surfaces and remain there until they're physically or chemically removed, or die off.

Unless they're somehow removed by unnatural means, they'll never be in the water column.
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post #10 of 10 (permalink) Old 11-13-2015, 05:42 PM Thread Starter
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No, their growth can begin on a number of surfaces and remain there until they're physically or chemically removed, or die off.

Unless they're somehow removed by unnatural means, they'll never be in the water column.
Thank you @discuspaul! I did not know this.....
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