Green Dust Algae 2+weeks scrap or not to scrap off? Pics inside - The Planted Tank Forum
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post #1 of 17 (permalink) Old 03-27-2010, 09:35 PM Thread Starter
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Green Dust Algae 2+weeks scrap or not to scrap off? Pics inside

Ok my 24g tank has Green Dust Algae I let it sit for over 2weeks and I can't stand looking at the tank any more lol. How do you know when its time to scrap it off? I looking around and they say that it falls off but mine doesn't look like its going to do that. Should I scrap it off or let it sit for another week?

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post #2 of 17 (permalink) Old 03-27-2010, 09:51 PM
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did you try to do a 3 day black out?
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post #3 of 17 (permalink) Old 03-27-2010, 09:52 PM
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hey i just noticed you live in VEGAS to.what part do you live in?if you dont mine me asking
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post #4 of 17 (permalink) Old 03-27-2010, 10:06 PM Thread Starter
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Henderson right near green valley ranch casino you?

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post #5 of 17 (permalink) Old 03-27-2010, 11:07 PM
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i live deep in the east,right by sunrise mountain
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post #6 of 17 (permalink) Old 03-28-2010, 03:46 AM
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I've had green dust for a while now and still having trouble shaking it.

I dont think scaping it is any good since it'll just come back (thats from 2 months of experience :p) I've also tried to leave it to die but my saes continously disturb it so i think that some always survives and it never all dies at the same time.

More recently read that GDA is an imbalance between magnesium and calcium. See http://www.aquaticplantcentral.com/f...ussion-18.html

Another method could be the suggestion by i love planted tanks with using a 3 day black out. I've noticed that after a complete scrape down GDA repopulates the parts of the glass that get the most light. Even the shadow casted by my therometer suction capped onto the glass was enough to stop GDA from growing in the shadowed parts. So maybe a complete scrape down (and rub the gda off the leaves of the plants) and followed by black out.
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post #7 of 17 (permalink) Old 03-28-2010, 04:55 AM
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I get patches here and there in my shrimp tank, I just scrap it off with a credit card about once a week, no big deal for me.

You on the other hand have yourself a problem, I'd do the black out for starters. Cover the tank in a few black trash bags so no light gets in for a few days, then go from there.

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post #8 of 17 (permalink) Old 03-28-2010, 12:01 PM
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The back wall of my 30gal looked like that at one point. I just ignored it for a about 3-4 weeks since I heard it'll go away on its own. The 6 ottos that i had in the tank at the time wouldn't dare touch that stuff the first few weeks. Once the life cycle was almost done, all six of my ottos was working on that glass like their life depended on it. Lol. It was quite a fun sight to see.
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post #9 of 17 (permalink) Old 03-28-2010, 02:44 PM
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i vote one more week. when i did mine it looked like it was about ready to fall off on its own.
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post #10 of 17 (permalink) Old 04-12-2010, 01:04 AM
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Any updates? My tank is at the end of week 6 and I'm starting to go through this too.


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post #11 of 17 (permalink) Old 04-12-2010, 02:26 AM
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Shrimp or snails could help. I say scrape it off with a sponge or something.
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post #12 of 17 (permalink) Old 04-12-2010, 04:33 AM
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scrape it, blackout, then start your lights for one hour and up them one hour each day till your back up to normal. carbon can help take extra nutrients out of the water. dont do any water changes or clean your filter as your killing the nitro bachter and adding nutrients to feed it w/water changes. my best guess.

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post #13 of 17 (permalink) Old 04-12-2010, 05:03 AM
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Try lowering the light, take some foil and place up in the hood to deflect it away from the front of tank, also, try 8 hours of light per day, and perhaps use only 1 bulb, not both.

This alga and it's bloom/persistence has nothing to do with Ca or Mg

As stated, for many, it went away on its own. So a little correlation can account for such reports that also have nothing to do with it's "cure".

I did nothing to the Mg/Ca in 2 tanks, it went away in 2-3 weeks.
I did a just the CO2 a little and waited.

A client's tank, simply reduced the high light to low light, all algae issues went away.

Others have also simply allowed it to go 3 weeks or so, then resist the temptation to wipe, and then a few days later, they wipe and clean real good, siphon it, correct light/CO2 issues.

My Ca and Mg levels have been all over and I was easily able to get under control. My KH's where 12 down to 1.
Ca from 2ppm to 70ppm, Mg from .5 to 50ppm.........

Big donkey ranges I'd reckon.........no issues.

I took samples from other tanks, could not induce it in others that had the same water, nutrient dosing etc.

The only differences that where of note: light and CO2.
Of course if you have only 1 tank and do not investigate inducing it, then there's really not much you can say, other than there was correlation.

Excess light "causes algae", I think is a much more realistic view.
But none of these folks seem to wanna talk about that, go figure.

Algae are not limited by nutrients or CO2, so what are they really limited by?
Plants? Often are limited by CO2/nutrients, so ...........

And when the plants do well, the algae does not, this is universal.
So the goal and focus is plants, not algae. I've said this for 15 or more years now.

It really has not changed.

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post #14 of 17 (permalink) Old 04-12-2010, 05:03 AM
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Quote:
Originally Posted by chad320 View Post
scrape it, blackout, then start your lights for one hour and up them one hour each day till your back up to normal. carbon can help take extra nutrients out of the water. dont do any water changes or clean your filter as your killing the nitro bachter and adding nutrients to feed it w/water changes. my best guess.
This would likely work for some species.


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post #15 of 17 (permalink) Old 04-12-2010, 04:51 PM Thread Starter
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Forgot about this thread thanks for all the info guys I did wait another week then wiped it off it was gross lol. As for today I really don't get a lot of it aside from a little on one side of the tank. As for using only one light can't, I just increase the co2 and started dosing ferts which I think fixed the problem. Here is the tank just taking 5min ago. Hmm why isn't my pictures showing up I tryed imageshack and photobucket and flickr and nothing. Guess you just have to click links hehe.
http://s725.photobucket.com/albums/w...&current=1.jpg
Here is the one side where I get some of the dust
http://s725.photobucket.com/albums/w...&current=2.jpg

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Last edited by HEINEKEN357; 04-13-2010 at 11:17 PM.
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