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Old 05-24-2011, 05:43 PM   #1 
SilverCaracal
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Algae Outbreak

There's always been a little algae in my tank, but it's everywhere now! I leave the light on
for 9 hours a day in the 2.5 gallon tank. It has a filter and a few live plants. The algae covers the
java fern leaves in a dark green film. The algae grows in massive amounts in the filter cartridge too.
I scrubbed the tank clean just yesterday and left the lights off for the day, but it's back again!
What's causing this?? Too many nutrients?
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Old 05-24-2011, 05:58 PM   #2 
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Test the water level for nitrate, nitrate and heavy light/sunlight usually is the biggest factors in algae mass growth.

Also, can you take a photo of the tank with them?
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Old 05-24-2011, 06:05 PM   #3 
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I haven't been changing the water any less or more often - 50% and 100% every week - so the nitrate/nitrite levels shouldn't be any different than it had been before the algae. As for the sunlight, the lack of light doesn't seem to halt the growth. I can't take a picture as of now, but I'll try when I get hold of the camera. I'm so confused...it's not growing accessively on the glass, just in the tank and filter cartridge...
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Old 05-24-2011, 06:06 PM   #4 
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hmmm... is the green sort of algae?
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Old 05-24-2011, 06:07 PM   #5 
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Look up blue green algae BGA or Cyanobacteria and make sure it not this...since it comes back and covers every thing so fast.....it has a bad smell too...it a bacteria-not a true algae.....
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Old 05-24-2011, 06:08 PM   #6 
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Fake algae.... BLEACH EEEEET!
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Old 05-24-2011, 06:10 PM   #7 
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Uh...I think it fits the definition exactly...so 5 day blackout is an option??

EDIT: It smells like...algae.

Last edited by SilverCaracal; 05-24-2011 at 06:14 PM.
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Old 05-24-2011, 06:27 PM   #8 
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I don't do black out but only because of the plants...if you do-remove as much of it manually and cover with something black...no peaking for 5 days...

The way I take care of it...I manually remove it with a vacuum daily and increase water movement...usually have it wiped out in a week or so....

Remove any livestock but leave the plants.....
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Old 05-24-2011, 06:51 PM   #9 
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Ok, I'll do the black out then since the plants are hardy-anubias and javafern. What caused the "algae" growth in the first place? Thank you!!
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Old 05-25-2011, 11:06 AM   #10 
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Big causes of BGA or cyano...too much nutrients, old lights, poor water movement/quality.....generally out of balance......this sounds like every Betta tank at one point....lol.....but-not every tank will get this bacteria.....

I have 15 tanks running and out of all these tank I have one that keeps getting cyanobacteria in and I am not sure why since all the tank are nearly alike except for one thing...light...this is one of my tanks that get sunlight from an East window-its out of balance some place...maybe it is too strong of light......I can keep it wiped out for about 9 months of the year and I fight it the rest...the only NPT that gets water changes more than 3-4 times a year....
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