Do I need to worry?

fishfry70

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Over the last couple of days a rapidly spreading, light brown color has been spreading in my tank. The only recent change I've made is a few days ago I added a light to the aquarium. I've been keeping the light on all day and turning it off at night.
Note. the coloration is only on the decor and plants, not the glass sides. Could the added light be promoting some kind of algae growth? If so, is it dangerous to my fish?
 

AquaticBrandon

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What kind of light do you have?
How long do you run the light for?
How long has your tank been running for? If it's recently been setup, It could be diatoms which is normal in new tanks.


 
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fishfry70

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The lights are 2, 24'' T8s and I leave them on for about 10 hours a day.
I have had the tank setup for over a year and I've never had anything like this happen.
 
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fishfry70

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Update.
I have also discovered that one of my java moss clumps has become very fuzzy, it gives it a very "soft" appearance. The fuzzy substance also appears to be in the roots of some of my other plants. Not sure if this is related or not but it certainly isn't normal, and it's come on very quickly.
 
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