Did something eat these?

JoshP12

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8 Dec 2019
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Canada
Hi all!

Most of my Rotala Rotundifolia looks good!

Except I noticed this in the pictures below:
1593041269854.png

What you are looking at is a picture taken of the rotala at the back of a bush against the glass(so there is a reflection behind it). I wouldn't be surprised if that thinning thickens later as it is likely just CO2 trying to make its way to there through the bush. I am not worried about those.
1593041420119.png

This one is bizarre? Ironically, both of these "holey leaves" line up along the same "time" a few days ago (since then healthy growth emerged).

Do they look munched on? I also thought it may be from my excel dose which I have recently reduced. It was only the two stems that were affected.

Any ideas?

Oh, and:
Size: 65 gallon
Lights: 2x AI prime at 35%
Flow: Spray bar
Filter: 365 GPH <-- bit slow about 5-6x my volume (purigen + foam + scrubby pads + fluval biomax)
Tropica + sand substrate + flourite below the higher portions
EI micro and macro daily
WC 60%'ers at least once a week at most twice.
DC = lime green
pH drop about 1.2 ish +/-
20 Neons, 3 ottos, 1 rubber lip pleco
Anubias, buce, ludwigia repens, rotala rotundifolia, s repents, crypt undulata, pogostemon erectus

1593041689888.png


Josh
 

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rebel

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Bit sus for Mg deficiency or maybe K. Any other plants struggling especially that Styrogyne repens?
 

JoshP12

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Bit sus for Mg deficiency or maybe K. Any other plants struggling especially that Styrogyne repens?
None at all. Literally the two stems exclusively in the entire tank.

The surrounding rotala look great.
 

JoshP12

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I am starting to think that I reduced my Excel dose too quickly and perhaps the unhealthy stems (I noticed a couple more - I just took a really good look) were unable to handle the transition so quickly. However, the already healthy, healthy leaves were probably just fine to adapt.

Josh
 

dw1305

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nr Bath
Hi all,
@dw1305 any ideas?
Not really. My guess is that it is a deficiency symptom, rather then mechanical damage by snail etc.
....for Mg deficiency or maybe K.
That would be my guess, but it would be just a guess.
I reduced my Excel dose too quickly
Carbon (C) would also be a possibility.

It is really difficult to diagnose most deficiency symptoms, iron (Fe), and to a lesser degree nitrogen (N), are possible and you can discount CO2 if you use a a floating plant, but after that you are struggling.

cheers Darrel
 

JoshP12

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Just a side note - how can only SOME plants show deficiency system in a tank? Meanwhile others show none - in the same area and species.

Is it as I thought where it was healthy enough beforehand to “handle” a nutrient limitation more effectively?

Josh
 

Ray

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Just a side note - how can only SOME plants show deficiency system in a tank? Meanwhile others show none - in the same area and species.

Is it as I thought where it was healthy enough beforehand to “handle” a nutrient limitation more effectively?
You’re not going to like the answer: every single plant has different requirements for CO2, light and each and every nutrient (within certain limits at least).
And yes, they can store stuff up to a certain extent and the ability to do that will vary too :)
 

JoshP12

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You’re not going to like the answer: every single plant has different requirements for CO2, light and each and every nutrient (within certain limits at least).
And yes, they can store stuff up to a certain extent and the ability to do that will vary too :)
I do like the answer!! So each individual plant even if all of the same species and in the same spot have slightly different requirements?

They are like fish 🐠? Individual temperaments? Lol.

Josh
 

Ray

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I do like the answer!! So each individual plant even if all of the same species and in the same spot have slightly different requirements?

They are like fish ? Individual temperaments? Lol.

Josh
The plants, even of the same species, adapt to the conditions they are in. Since light and flow (which affects access to nutrients including CO2) are not uniform everywhere each stem will be running a slightly different configuration.

So a stem that has worse flow but more light will try to grow faster but also run out of nutrients sooner - thus showing deficiencies first - if that makes sense?

EDIT: you could also in theory have genetic differences although most of the plants we buy are probably derived from the same stock.
 

JoshP12

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I started noticing more plants experience this as I continue to reduce my Excel dose ... I am going to stop dosing it entirely so I expect to see more of this melt.

For what it's worth, it is absolutely remarkable to see the plant suffer from experiencing one content of Carbon to a relatively sudden drop -- the effects are real.

I am sure that this can occur with other nutrients as well. Plants adapting to their conditions are remarkable. In one of the photos above, there was death in a lower leaf but all new leaves were healthy. It must have rearranged its configuration in between :thumbup:.

Cheers,
Josh
 
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soham

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5 May 2012
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Currently living in Poland (from India)
Please stop dosing EI for few days, reduce your trace dosing to a max of 0.1-0.2 ppm per week. For potassium and nitrate stay under 5-7 ppm.Do few water changes. Ofcourse you can increase the dosing even more as few suggested, I bet you wouldn't see any difference. How hard is your water?
 
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