Green Algae Menace - The Planted Tank Forum
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post #1 of 20 (permalink) Old 10-25-2011, 08:51 PM Thread Starter
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Green Algae Menace

Hi guys,

my tank has running for almost a month and a half now and I recently ran into some algae issues. The first algae outbreak was some kind of thread algae but that luckily went away on its own after double dosing excel for a week. Now, however, I have a new algae attacking my tank. It is a green algae that likes to attach itself to any surfaces within the tank. I have it on my glass rocks and now plant leaves. Some of my plants, notably the rotala vietnam have taken a particularly hard hit from this algae and have begun to die back. I wonder if any of you guys might be able to tell me what kind of algae I have and how to best treat it.

Here are some photos (please excuse the poor quality)

on the rotala vietnam


on a rock in the tank


I noticed this algae beginning about two weeks ago but it did not really spread until last week.

My tanks specs are

Equipment:
11.4 gallon tank
36watt pc bulb light
Paintball co2 keeps drop checker light green
Eheim 2211 filter

Substrate:
Flourite with MTS beneath as well as root tabs

Fert

Just flourish comprehensive dosed by directions on bottle
and excel also dosed as directed by bottle (maybe a bit more hard to be accurate with just using cap as measure)

The lighting period is 8 hours

Thanks for any advice you guys have in advance. Also, if you need more info please feel free to ask

thanks again guys
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post #2 of 20 (permalink) Old 10-25-2011, 08:56 PM
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looks like GDA
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post #3 of 20 (permalink) Old 10-25-2011, 11:17 PM Thread Starter
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looks like GDA
after looking at other images of gda, I think that you are right... but how do i get rid of this?
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post #4 of 20 (permalink) Old 10-26-2011, 12:04 AM
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after looking at other images of gda, I think that you are right... but how do i get rid of this?

GSA is caused by phosphate deficiency. Get a test kit to test your phosphate level. To correct is obviously to dose more phosphate. Is kind of pretty though...

Last edited by tetra73; 10-26-2011 at 08:51 PM.
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post #5 of 20 (permalink) Old 10-26-2011, 04:40 PM
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GDA is caused by phosphate deficiency. Get a test kit to test your phosphate level. To correct is obviously to dose more phosphate. Is kind of pretty though...
GSA, green spot algae, can be caused by phosphate deficiency, but I don't believe GDA is. All algae are ultimately "caused" by too much light, just as plant growth is "caused" by light. If that 36 watt PC light is an AH Supply light or has a reflector as good as an AH Supply reflector, you almost certainly have high light, and that makes keeping algae away very difficult.

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post #6 of 20 (permalink) Old 10-26-2011, 07:28 PM
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GSA, green spot algae, can be caused by phosphate deficiency, but I don't believe GDA is. All algae are ultimately "caused" by too much light, just as plant growth is "caused" by light. If that 36 watt PC light is an AH Supply light or has a reflector as good as an AH Supply reflector, you almost certainly have high light, and that makes keeping algae away very difficult.
I SECOND THIS MOVEMENT

i have rediculously high c02 because i have such high light.. TURN IT DOWN. you will be wasting time and energy on an endless struggle

i've finally reached a happy point but if i could do it all over.. i'd go less

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post #7 of 20 (permalink) Old 10-26-2011, 08:51 PM
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Quote:
Originally Posted by Hoppy View Post
GSA, green spot algae, can be caused by phosphate deficiency, but I don't believe GDA is. All algae are ultimately "caused" by too much light, just as plant growth is "caused" by light. If that 36 watt PC light is an AH Supply light or has a reflector as good as an AH Supply reflector, you almost certainly have high light, and that makes keeping algae away very difficult.

I actually meant GSA....
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post #8 of 20 (permalink) Old 10-26-2011, 08:53 PM
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after looking at other images of gda, I think that you are right... but how do i get rid of this?

Oh, I believe they are actually GSA, not GDA. GDA tends to grow on glass and they don't normally become that green.
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post #9 of 20 (permalink) Old 10-26-2011, 09:07 PM Thread Starter
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hi guys thanks for all the replies. I have a couple more photos that I would like to share. I tried to get a closer shots of the algae, but my camera being a point and shoot can only get so close. Anyway, when I tried looking closer to the algae, I noticed that it seemed to have a fuzzy look to it. Kind of wavy tiny tiny strands. Not sure if you guys can make it out in the new photos. I just was wondering if these strands are consistent with GDA or GSA.


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post #10 of 20 (permalink) Old 10-26-2011, 09:13 PM
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I got to say as far as algae goes that is really, really pretty. I would almost be distraught thinking about having to remove it.


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post #11 of 20 (permalink) Old 10-26-2011, 09:18 PM
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i would agree that on the rock it does look kinda cool.. i'd hate it on the plants though

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post #12 of 20 (permalink) Old 10-26-2011, 09:34 PM Thread Starter
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I got to say as far as algae goes that is really, really pretty. I would almost be distraught thinking about having to remove it.

I agree it kind of looks cool. Gives the rock a natural kind of look
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post #13 of 20 (permalink) Old 10-26-2011, 09:35 PM Thread Starter
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i would agree that on the rock it does look kinda cool.. i'd hate it on the plants though
That's the only reason that I am trying to get rid of it. It's killing some of my plants. Some plants don't really care that it's there but my HC and Rotala Vietnam are taking big hits from this algae it appears If that wasn't the case I would actually try to keep the algae on the rocks
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post #14 of 20 (permalink) Old 10-26-2011, 09:42 PM
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well then u need to rule out hwy its there.. fix the problem and cut off the leaves that are affected

i'd increase c02.. or decrease light amount.

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post #15 of 20 (permalink) Old 10-26-2011, 09:48 PM Thread Starter
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is it ok to make the drop checker go into the yellowish range of color? I have it at light green right now but is it ok to push for a bit more co2?

I do have some cherry shrimp in the tank and heard that shrimp can be finicky with co2 going too high
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