Anubis leaves turning brown/black

xingu

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Apr 26, 2009
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Any idea of the cause of this?

I read somewhere that it could be that they are too close to the light, have since moved them down to substrate level but it continues.

Ideas?
 

xingu

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Apr 26, 2009
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One is at least 3 years old, the other 2 are newer.

i'll get some photos tomorrow, may help diagnose.

There are some newer lighter green leaves on one of them and they are all definitely growing.

I don't add anything to the tank to feed as such, other than fish ;)
 

bigbird

Pleco Profiles Moderator - RIP FRIEND
Sep 9, 2010
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OK photo might help. Maybe the yellow ones if they are the larger ones are being replaced by new growth or maybe the larger ones, the roots have gotten to the soil....photo please cheers jk :thumbup:
 

D-MAC

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Jul 24, 2009
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It could be excess Phosphate
This is taken from Badmanstropicalfish .com

Excess Phosphate.

Symptoms:

Production of the Iron Phosphate causes the leaves to turn Black or Brown and to die. In addition if there is an excess of Nitrates your tank will experience an Algae bloom.

Cause:

Not performing your water changes on schedule or not changing enough water.

Remedy:

Change a large portion of your water right away. Then modify your tank maintenance routine to include larger water changes or more frequent ones.
 

dw1305

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May 5, 2009
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Hi all,
It might be that the rhizome has decayed, a couple of years ago strange things happened whilst I was away with some fish deaths, when I came back nearly all the other plants were enormous, but all my Anubias plants "melted", and when I looked I found them all with with dead rhizomes.

cheers Darrel
 

xingu

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Apr 26, 2009
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Pictorial evidence.





Have been slack with WC recently, some tank maintenance due this weekend before a speical import (hopefull) arrives
 

dw1305

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May 5, 2009
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Hi all,
Got it from the photo, the black colour is an algal covering, it is one of the red algae and will probably develop into Black Brush Algae - "BBA". Compsopogonis the scientific name of the algae.

Anubias ae very prone to it, mainly because the individual leaves last a long time. Red Ramshorn Snails eat it, but it is hard to remove physically and difficult to control. You can shade it out, but it doesn't need much light to grow. I've got it in some tanks, but only where the water is to soft for Ramshorn Snails.

Have a look here, but I wouldn't recommend dipping the plants in bleach
<http://aquarium-dakar.info/?algae-in-aquarium>. There is also a similar thread on PC <http://www.planetcatfish.com/forum/viewtopic.php?f=4&t=23536>.

cheers Darrel
 

dw1305

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May 5, 2009
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Hi all,
Should also of said the new leaves look a bit small and pale, you could try adding a bit of potassium nitrate (KNO3) (not sure how easy it will be to get for you, as it is an explosive as well as a fertiliser). You only need to add 5ppm ish K. That should green them up pretty quickly. If it doesn't you need a complete fertiliser mix, our sponsor sells one <http://www.aquariumplantfood.co.uk/>.

You don't need to use a lot of this, have a look at the "Duckweed index" part of this post. <http://www.plecoplanet.com/forum/showthread.php?t=8254>

cheers Darrel