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Discussion Starter · #1 ·
I first need some help to I.D. this plant, which was sold to me as Alternanthera reineckii Pink. I'm not 100% on whether it is that particular plant or not, it's lost much of it's colour so that might make it harder to define.

The main problem is the melting and curling leaves, what exactly is causing this?
The other stem plant (which I forget the name of) running alongside is a bit better off but not exactly thriving. If you guys can help with advice on that one it would be great also but my main concern is with the reineckii.

Cheers :biggrin:
 

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Plant Whisperer
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Can you post more photographs of the plants in your tank? Closer up and straight on rather than at an angle would be best. The finer the detail the easier it will be to tell what is wrong.

Take some pictures of the other plants in the tank, they may be showing early signs of the same problem and will make it easier to figure out.

What fertilizers are you adding, how often are you adding them, and how much of each are you adding?

Can you do a nitrate test?
 

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Discussion Starter · #3 ·
I dose with Tropica Specialised fert 18 mls per week, and Easy life Fe 18mls per week. I have JBL Kugeln clay balls placed at my Ludwigia and Reinekkii.

My Nitrate has been at a steady 10ppm for at least a couple of weeks now, and I just tested it again there, still at 10ppm.
Not sure if this is relevant, but I did put 4 clay balls under the Reinekkii. Could this have been too many?

Plant notes:
The Reinekki has been the most problematic, while the Java fern has had some melting back also.
The Micro Swords (hard to make out) have had slight yellowing of the leaves.
Styrogene Repens (not sure if I spelled it right) has some algae growth on the leaves.
Ludwigia Perennis has lost some red colour in it's leaves, which are turning green in parts that are not highly lit. A sign I might need to upgrade my lighting.
Dwarf Sag, Amazon Sword, Java moss, Anubias Nana and Echinodorus palaefolius var. are all doing well.

I hope these photos are good enough quality and close enough, as they were only taken with an iPhone.
 

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Well, it is likely a macro nutrient deficiency (nitrogen, phosphorous or potassium) since it shows up only in the old leaves.

Looks like it might be potassium deficiency, though why only that plant and not the Hygrophila behind it I do not know. If it was a tank-wide potassium deficiency then I'd expect the Hygro to show pinholes as well since that plant frequently develops potassium deficiency first. Unless the Hygro is a new addition?

Do you have any way of adding potassium to the tank? K2SO4 would be a good chemical to add and see if the plant stops deteriorating. Old leaves will not heal, but new leaves will not deteriorate as the plant grows.

Also, stable nitrate levels seems suspect to me. Nitrate kits aren't very reliable unless you have calibrated them.
 

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Discussion Starter · #5 ·
Potassium is definitely not on my fert shelf. The Hygro (I assume that's the plant beside the Reineckii?) has been there for couple months now.

Sounds like I should get Potassium and other Macros just to be sure, while trimming back the old leaves? Should I divide up my weekly dosages into daily instead?

Up till recently before I dosed with the Tropica (which has lots of Nitrate) the kit showed Nitrate at 0. Maybe the 10ppm is the added fert? Should I test my tap water or something to make sure it's not a fault in the kit?
 
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