HC Cuba turning blue and breaking at the stems - The Planted Tank Forum
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post #1 of 27 (permalink) Old 09-05-2013, 05:17 AM Thread Starter
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HC Cuba turning blue and breaking at the stems

Aloha everyone
I've been growing HC Cuba in a new 10 gallon tank.
It's been 3 weeks and considering the larger ADA substrate (didnt get any powder) the baby tears are flourishing in most of the tank, everywhere except for one corner of the tank.
This one corner of the baby tears seems to be turning a darker green/blue color starting at the stems, and then breaking at the stems, swaying weakly in the current. I'm realizing that corner of HC is pretty much dying.
I have good lighting (Finnex Ray 2) at 8 hours a day, CO2 at about 8 hours also.
Been researching online, and Jojo at Aquascapes Hawaii said it could be blue-green algae.
So I got some algae control additive, and will keep the lights off for a few days.

But I really could use some help from forum members. What else could it be, and how can I treat it?

Thank you!
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post #2 of 27 (permalink) Old 09-05-2013, 05:27 AM
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If it is blue green algae (cyanobacteria) algaecide won't do squat. You would need an anti bacterial. That said I see no blue on those stems... I'm on a tablet though
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post #3 of 27 (permalink) Old 09-05-2013, 05:45 AM
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I don't think it's algae or Cyanobacteria, I think it has to do with the flow in that spot, I've seen this before does it almost seem melted or transparent in that spot? and is it less than a month or two old? because if so it's probably just old growth that's not used to those conditions and when the new growth comes in it should be healthy and fine
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post #4 of 27 (permalink) Old 09-05-2013, 07:37 AM Thread Starter
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Thanks aparker & John.

The blue seems to start at the stems, then making them weak & sway, then break. Yes kinda like melting.
I don't really see any regrowth coming after...
The tank is only about 5 weeks old.
Here's a photo of a 2 week progress, then another after 4 weeks.
The rest of the tank is doing well. But I don't want this melting to spread.
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post #5 of 27 (permalink) Old 09-05-2013, 07:40 AM Thread Starter
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After 4 weeks > upper right corner area HC is dying off
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post #6 of 27 (permalink) Old 09-05-2013, 07:44 AM Thread Starter
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After 4 weeks > HC dying off in front left area
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post #7 of 27 (permalink) Old 09-05-2013, 07:49 AM Thread Starter
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Another close up of the melting
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post #8 of 27 (permalink) Old 09-05-2013, 02:33 PM
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Whats the temperature, is it too warm?
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post #9 of 27 (permalink) Old 09-05-2013, 04:00 PM
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i wouldnt say temp due to that half the tank is flourishing while the other half is slow/dying.
i would def. check flow. that corner could be a dead spot. also is your lighting centered on the tank. that one corner seems to get less light then the opposite corner. i bet that due to the shape of the rock you have in that corner, you are blocking either flow or light.
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post #10 of 27 (permalink) Old 09-05-2013, 10:49 PM
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Ditto on the flow recommendations. With it being a corner and having that rock in the way (=turbulence=reduced flow) it's a prime candidate for being a dead spot. And as suggested it may be blocking light as well. Combined conditions could be a lot worse for the plant than either one alone, so this makes sense to me.

FWIW, if you need to lick cyano (which I'm not sure is the case here) you'd want an oxidizer - like ChemiClean and most/all of the powders on the market, or even hydrogen peroxide - not an antibiotic. I'd stay away from antibiotics use wherever possible. Twenty-two years of aquariums and I've never needed any...fwiw.

Great looking tank in spite of current difficulties, BTW!

-Matt
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post #11 of 27 (permalink) Old 09-06-2013, 12:33 AM Thread Starter
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Thanks so much for the advice everyone! Very much appreciated!
I'll try to get more light & circulation in that corner...or maybe try to grow a different plant in that area? I'm visually thinking a couple erios?
Any thoughts?
And thx Matt!
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post #12 of 27 (permalink) Old 09-06-2013, 02:08 AM Thread Starter
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Ok guys....I just noticed that the blueness is starting to spread, to other areas of the HC.
Looks to be starting at the stems, working up into the rest of the plant...
Is it a bacteria? Should I get some antibiotics?
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post #13 of 27 (permalink) Old 09-06-2013, 03:27 AM
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I'd try turning the filter off, and in one of the effected area try using a syringe to dose a bit of Hydrogen Peroxide on there...I had a bit of a hair algae problem and the peroxide pretty much dissolved it...of course it doesn't fix the cause but it is a temporary fix.

I'm attaching a photo...My HC in the right corner pretty much disappeared because the Rotundifolia blocked out a lot of the light

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post #14 of 27 (permalink) Old 09-06-2013, 03:50 AM
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Looking over this thread and was wondering if this tank was started DSM?

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post #15 of 27 (permalink) Old 09-06-2013, 05:19 AM Thread Starter
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Yes this tank was a dry start. I uploaded photos in my album. I've heard of HC melting after dry starts...?
I showed Jojo at Aquascapes photos of the dying HC, and he said it doesn't look like algae, more of a rotting, maybe a sign of the tank wanting to cycle through its first month. Tank is only about 5 weeks old.
HC flourished, but now dying. Jojo said to let it take its course. I'm afraid of losing all of the HC which has grown well.
Any thoughts...
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