Cork bark in the high tech aquarium - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 11-27-2012, 01:57 PM Thread Starter
Algae Grower
 
Join Date: Mar 2009
Location: middle east
Posts: 6
Cork bark in the high tech aquarium

Hey everyone,
I have put some natural cork bark into my high tech aquarium (after cutting and shaping it until it looked just right ), only to discover that after almost 2 months it seems to be "melting" away... (shrinking in size, shape change etc)

Does anyone have any idea why this is happening?
Could it be my Excel? dry ferts? co2??? that is causing this problem?

I used it under the assumption that it would last for a very long time...

In the meantime I have stopped using Excel. Hope some one can shed some light on the subject for me.

Thanks,
Planty.
planty is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 11-27-2012, 08:48 PM
Planted Tank Guru
 
lochaber's Avatar
 
Join Date: Jan 2012
Location: Oakland, CA
Posts: 2,318
Do you have any pics (a before and after would be preferable, but even just a current pic may help).

Also, I'm assuming it's virgin cork bark (the type that looks like bark, and is sold in tubes and curved sections) and not the type they use for bulletin boards/flooring?
lochaber is offline  
post #3 of 6 (permalink) Old 11-28-2012, 06:47 PM Thread Starter
Algae Grower
 
Join Date: Mar 2009
Location: middle east
Posts: 6
I do not have a good before pic. But here are a few as of today ( iphone pics..)
There is a crack from the bottom right to the center that was not there before. Plus the distance to the glass is much greater than it was. There are more little changes that are harder to point out...

Hope u can make sense of it.
Thank you.
Attached Thumbnails
Click image for larger version

Name:	ImageUploadedByTapatalk1354131504.428486.jpg
Views:	133
Size:	75.0 KB
ID:	57877  

Click image for larger version

Name:	ImageUploadedByTapatalk1354131538.913020.jpg
Views:	127
Size:	78.9 KB
ID:	57878  

Click image for larger version

Name:	ImageUploadedByTapatalk1354131590.397541.jpg
Views:	132
Size:	75.8 KB
ID:	57879  


Last edited by planty; 11-28-2012 at 07:09 PM. Reason: order
planty is offline  
post #4 of 6 (permalink) Old 11-28-2012, 08:32 PM
Planted Tank Guru
 
lochaber's Avatar
 
Join Date: Jan 2012
Location: Oakland, CA
Posts: 2,318
My best guess is that despite cork being very water resistant, it is absorbing some water and warping, causing it to bend and arch away from the glass.

Not sure about the melting/decay bit.

I've used cork bark in palludariums before, but not in aquariums. I read one account where someone used it to terrace the substrate (may have been on here, I can't remember) and it seemed to work pretty well, but after a few months the pieces detached and floated up.
lochaber is offline  
post #5 of 6 (permalink) Old 11-28-2012, 08:48 PM
Planted Tank Guru
 
Join Date: Jan 2010
Location: Contra Costa CA
Posts: 11,513
I have used a different species of oak bark (cork is a species of oak) and it does change shape when it is under water. I do not know why, except in one case: Loricariads will eat it. My Royal Pleco scraped one piece down from 2"+ to about 1/4" thick. Took a few years!
Other pieces have split, curled or flattened out as they absorb water. Then they seem to stay almost the same, but not quite. Perhaps it is decomposing. This takes a while, but if you have used it in a place that required a near-perfect fit, then I suppose you would see the difference a lot sooner.
Diana is online now  
post #6 of 6 (permalink) Old 11-29-2012, 09:55 PM Thread Starter
Algae Grower
 
Join Date: Mar 2009
Location: middle east
Posts: 6
Thanks lochaber and Diana for your replies.
The more I think of it (and look at it), I can assume you are right and the bark is warping. What was a little nick now looks like a big crack, and its getting larger :-(, I've noticed in the last few days a bigger change in the overall shape.

Hope the worst is behind and that it will start settling soon.
planty is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome