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Old 02-13-2012, 09:37 PM   #1 
practicaltactics
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Angry What is this stuff in my betta tank?! (pics)

I have cleaned this stuff off over and over and change the water but it keeps coming back! I am not quite sure what it is Need help!

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Old 02-13-2012, 09:42 PM   #2 
Myates
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Algae.. and looks to be brown algae.. ick.

Live plants, keeping the tank light on too long (10+ hrs), not siphoning/cleaning enough weekly can cause algae to happen..

Brown algae usually pops up in newly established tanks before the tanks are stabilized.. roughly 2-12 weeks or so. It can disappear once the tank stabilizes, but until then avoid overfeeding and make sure to keep up on the weekly water changes.
Lessening the lighting won't deter it, as it will grow in low light and unfortunately, will out compete the green algae.

If the tank has been established, cycled and up for a long period of time, then you would need to do other things- such as more thorough substrate vacuuming, and an increase in water changes.

Even then it's pretty much essentially impossible to remove the algae.. one theory I tend to think is that if the silicate to phosphate ratio is high then diatoms are likely to have growth advantage over true algae types and cyanobacteria.
The silicate can come from tap water.. also leeched in from new glass aquariums. Possibly also from silica sand/gravel substrate to some extent.
But once the leeching is slowed and phosphate is accumulating the ratio should change in favor of the phosphate and green algae will start to grow and the brown will lessen.

Just continue to clean the tank, make sure to do siphoning weekly if you don't have live plants- live plants 1-2x a month. And keep cleaning it off.. and hope for the best.
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Old 02-13-2012, 09:45 PM   #3 
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+1 to Myates.

In healthy tanks, it isn't uncommon to see just a tiny bit of algae or diatoms in a small patch here or there on the glass. I prefer to leave it be on the three sides that don't matter (the snails appreciate the small bits of grazing) and I scrape off any that builds up on the front while I do water changes, but that's just me.
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Old 02-13-2012, 09:48 PM   #4 
practicaltactics
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The tank is still pretty new,(about 3 months old) I do also have sand/gravel. Is this harmful to the bettas in my tank at all? I do have plants in there, so only do it 1 to 2 times a month?
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Old 02-13-2012, 11:06 PM   #5 
styggian
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Looks like diatoms, I have it in my sorority. I added some zebra nerite snails to graze on it, otherwise I just ignore it, but iit's not as thick as in your photos. It's not dangerous, it's just unsightly.
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Old 02-15-2012, 07:52 AM   #6 
kfish
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Ugh, when I had my 5g set up I couldn't get rid of this stuff. I vacuumed the substrate once a week during my 50% water changes, even though I had plants, and scraped it off constantly. It was still there after 8 months. Haaaaate ittttt.
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