Damage or deficiency?

[Viv]

Just done my weekly water change on my 180l planted tank and noticed two leaves, on two separate echinodorus species each have a mark on one of their leaves. The plants look fine apart from these marks, so I'm not sure if its damage or the first signs of a deficiency. I dose trace and potassium nitrate +potassium phosphate 3 times a week on alternate days with one day 'off' the day before water change. There are no pin holes in the centres that I can see. Older leaves look normal and the plants are growing well. Any thoughts?

Viv

 

[ceg4048]

Hello,
If these are not caused by predation then holes in plants are otherwise always caused by a carbon deficiency.

Cheers,

 

[Viv]

Thanks ceg There aren't any holes, at least not yet. Does it look like this might be the start though? I am having trouble with my regulator and have another ordered, but at the moment I can't increase the CO2. I've got liguid carbon if adding that would help?

Viv

 

[ceg4048]

Yes, liquid carbon is the same as adding CO2. Add more and see if it prevents the damage from getting worse.

Cheers,

 

[Viv]

Okay, will do. Thanks

Viv