Red algae or bacteria help

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h1n1

Feeder Fish
MFK Member
Apr 14, 2011
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Hello I've had a red slime in my tanks on and off for a while and i don't know what it is or if it's bad? I've posted this befor but no one knew but now I have a pic please help I just hope its not dangerous. Also the water looks dirty bc I'm doing a water change and I whipped it off but it ofcourse comes back. I honestly don't clean this tank as much as I should so there is an abundance of nitrogens.


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It is probably red algae, as opposed to bacteria, is brought in on wood, or plants, or even with a bag of fish that has algal filaments floating in it.
It thrives if there is iron in the water either naturally or when using plant fertilizers high in iron, are added.
I have it in one of my tanks, and don't find it a problem aesthetically, in fact I like it.
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Limiting light doesn't seem to help in reducing it, the tank I have it in, is a low light tank. However the kind of light might help. I use regular shop light on my tank, a better quality bulb might eliminate rather than help it grow. Also..
Adding plants that compete for the iron, more frequent water changes, and lighter feedings are probably your best bets for getting rid of it.
Try taking a pic before you do a water change.
The tank I have it in, is a 75 gal with only 2 fish (except when they have fry and they graze on it), although it is in a line of tanks, that I feed plant food once per week to, once of the other tanks is heavily planted, it is not.
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I believe that red algae is less photosynthetic than your typical green or bubble algae, with red algae it's usually involving the abundance of a nutrient in the ecosystem, in fact in the ocean these gigantic blooms occur seasonally in some areas and they are referred to as crimson tides. But I agree with the careful feeding and strict lighting, unfortunately , it's often the smallest organisms that give us the most trouble. Good luck mate! Cheers!


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Thanks for all your responses but I kno you can't tell from the pics but it looks alot like sineal bacteria(sorry about the spelling) but its red it doesnt look like an algae I've seen before


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Serratia is a genus of reddish bacteria, but it requires a very specific substrate, it ca be found in the lines of refrigerator icemakers, usually requires glycerol to thrive. Can be an opportunistic infection cause.
Another reddish/orange bacteria commonly found is iron bacteria, half dozen genus types, but this would occur only if you have high iron content in your water, from a well. Usually not an infection concern.
 
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