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Stem leaves, black stripes - what's the cause?

Kezzab

Member
Joined
18 Jan 2016
Messages
1,361
Location
Carlisle
Hi all, would appreciate an opinion on this.

Pic below is heteranthera zosterfolia.

Ignoring the wee bit of algae, you can see the horizontal black lines across tne leaves, alomst like theyve cracked.

In a previous scape in this tank the same happened with rotala colourata.

What's the likely cause? My suspicion is Co2 but im not sure.

Anyone know better?

K
 
Last edited:

Kezzab

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Thread starter
Joined
18 Jan 2016
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1,361
Location
Carlisle
20200222_175414.jpg
 

jolt100

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Joined
13 Jan 2008
Messages
118
Location
bury,lancs
My opinion would be mechanical damage.
My H.zosterfolia gets similar cracks if I trim it or catch it when water changing or in heavy flow areas . Often the black/purple bruising runs to the end of the leaf. If they are unsightly i just peel the leaf off trying not to damage the rest, or just pull it up and replant the tip.
Cheers
John
 

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