What is this yuck? - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 02-23-2019, 07:42 PM Thread Starter
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What is this yuck?

I have no idea what this is. It started about a month ago and has taken over everything. I boiled my large rocks today, soaked them in bleach water, tried to scrub it off with a brush and it does not come off. I have no idea what it is. It's red and hard to scrape off of the glass also. I had to throw away 2 large anubias plants as it would not come off. I tried excel, bleach soak, peroxide. Any ideas? It is out of control and I have no idea how to get rid of it. Thanks in advance.
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post #2 of 8 (permalink) Old 02-23-2019, 07:53 PM
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First thought: Potassium deficiency.

But I'm fairly new at this and will be interested to hear what others thing.
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post #3 of 8 (permalink) Old 02-23-2019, 08:01 PM Thread Starter
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Not sure why a potassium def would grow a red crust all over rocks and the glass. Never heard of that happening. Any other ideas?
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post #4 of 8 (permalink) Old 02-23-2019, 09:41 PM
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Ah, I understand now. The second photo looked like brown dead patches in the leaves, but it's actually a red crust. Perhaps red slime algae, which is actually a form of blue-green algae?
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post #5 of 8 (permalink) Old 02-23-2019, 09:58 PM
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Oh wow! Thats weird.


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post #6 of 8 (permalink) Old 02-23-2019, 11:57 PM Thread Starter
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I know. It is stressing me out. I know my nitrates are high, but they always are. I did a 30% water change today and plan another one tomorrow. All the other parameters are fine. My tank is about 3.5 years old and I have never had algae or any issues. I only use leafzone every other week or so when I do a water change. I have 2 angelfish, a white cloud and 2 cory's. That's it. Fed every other day. Hope somebody has seen this and can identify it for me.
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post #7 of 8 (permalink) Old 02-24-2019, 03:26 AM
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That is odd. I've seen red algae/bacteria that look like that in marine tanks but never in fresh.

See here:

http://oi59.tinypic.com/33durr5.jpg
https://www.plantedtank.net/forums/2...pot-algae.html

Very similar pic here but no help in the thread:


https://www.aquariumforum.com/f5/red...ank-14923.html

Another:
https://www.karrgalaxy.com/2017/10/red-algae-problems/


Hildenbrandia sp. seems like the best guess from what I see.
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post #8 of 8 (permalink) Old 10-20-2020, 08:07 PM
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I know older thread but figured I would give a shot....You ever determine exactly what algae this is? I have had in my freshwater planted tank for years and can't get rid of. Any luck determining what it is and how to get rid of? Seems to be outside of the normal algae and can't find any info on it.

Thanks
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