is this calcium deficiency? - The Planted Tank Forum
 
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post #1 of 13 (permalink) Old 09-09-2014, 07:17 PM Thread Starter
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is this calcium deficiency?

ludwigia repens newer growth is a little winkled look or something.

no other plants shows similar symptoms.

the thing that confuses me is i already dose 2x 1/4 tsp of micros, this is alot i thought. tank is non co2 non excel.

I think i am going to need to dose my tank as if it were co2 enriched. seems like my plants are pretty demanding for being lowtech.



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post #2 of 13 (permalink) Old 09-09-2014, 11:20 PM
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Chlorosis is developing. Probably add nitrate.
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post #3 of 13 (permalink) Old 09-10-2014, 05:19 AM
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If the GH is at least 3 degrees, then it is not likely Ca, though it could be.

Is this tap water? Or is it RO?

If it is tap water you can probably read a water quality report and get some idea what the GH, Ca and Mg levels are. As long as these are not zero, then it is rare for Ca deficiency to show up.

If you are using RO water, and not adding GH booster, then perhaps it is Ca deficiency. Fish food does not have much Ca.
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post #4 of 13 (permalink) Old 09-10-2014, 07:16 AM
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Love the cardinals.
Might consider dosing Estimative index type fert routine for low tech once a week dose.
This would prevent deficiencies.
Just look to see what daily dose is for high tech EI and dose this amount once a week.
Then after a few weeks (4or5) you can try a little less of the fertz and judge the effects.
This is what I do, for it is easier for me to begin with what I know to be plenty of fertilizers than it is for me to slowly work up the dose while plant's may be suffering.
With NON CO2 you know that the CO2 is what it is gonna be.(natural processes)
With weekly dose of all nutrients you know there is plenty of food for the plants.
This leaves only the Lighting to be concerned about.
I perform weekly 50% water changes just like I have for years and plant's and fishes thrive.
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post #5 of 13 (permalink) Old 09-10-2014, 10:42 AM Thread Starter
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I use normal tap water.

I dose ei.

What else could cause this sort of wrinkling / weird shape in the repens leaves?

Cardinals are one of my favorite tetras. Love em. I got 25 since we started the tank over 5 months ago.

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post #6 of 13 (permalink) Old 09-10-2014, 12:19 PM
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Quote:
Originally Posted by philipraposo1982 View Post
I use normal tap water.

I dose ei.

What else could cause this sort of wrinkling / weird shape in the repens leaves?

Cardinals are one of my favorite tetras. Love em. I got 25 since we started the tank over 5 months ago.
I guess I misunderstood your post.
I thought you were only dosing micronutrients twice a week hence my suggestion of dosing.
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post #7 of 13 (permalink) Old 09-10-2014, 12:30 PM Thread Starter
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Yeah and macros 3x a week

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post #8 of 13 (permalink) Old 09-10-2014, 01:16 PM
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Quote:
Originally Posted by philipraposo1982 View Post
Yeah and macros 3x a week

Can only share what I dose 80 gal tank with once a week which would be close to what you have if this is the 75 gal.
I dose..
3/4 tsp KNO3 once a week
1/2 tsp KH2PO4 once a week
1/4 tsp Epsom salt (magnesium) once a week
1/2 tsp CSM+B once a week one day after water change
I believe I have enough calcium (fairly hard water) but water report or GH test does not tell me which mineral makes up the GH so I add a little magnesium in the form of Epsom salt.
If your adding macros three times a week, I should think you have macros covered and ditto for twice weekly micros.
Maybe PM member Zapins and see what he thinks for I am not as accomplished at recognizing possible deficiencies as he is so I can only share what works for my tank of close to same size as yours and moderately hard water 12DGH.
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post #9 of 13 (permalink) Old 09-10-2014, 03:05 PM
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I don't think this is a deficiency. You'd need many other plants showing the same sort of problem to support the deficiency idea.

Sometimes leaf malformations are due to something that bumps or damages the forming leaf when it is still in the bud form. This causes weird looking growth and has nothing to do with deficiencies.

I'd say you are in the clear.
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post #10 of 13 (permalink) Old 09-10-2014, 03:46 PM Thread Starter
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You would think.... But my hygros show potassium deficiencies even with. 22ppm potassium each week

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post #11 of 13 (permalink) Old 09-10-2014, 05:18 PM
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Quote:
Originally Posted by philipraposo1982 View Post
You would think.... But my hygros show potassium deficiencies even with. 22ppm potassium each week
Then either it isn't potassium deficiency, or they had potassium deficiency and the holes are still present on old damaged leaves but not spreading to new leaves, or your tank is using 22 ppm a week of potassium and you need to bump up the dose.

My 90g tank developed potassium deficiencies when I dosed less than 25-30 ppm a week. Heavily planted to be sure, but still. You need to dose as much as plants will use, the EI recommendations are just guidelines.

Close up photos of the hygros will help figure out if its K deficiency. But the ludwigia issue doesn't look like a nutrient problem to me.
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post #12 of 13 (permalink) Old 09-10-2014, 05:20 PM Thread Starter
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Alright thanks.

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post #13 of 13 (permalink) Old 11-15-2015, 07:51 AM
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Quote:
Originally Posted by philipraposo1982 View Post
ludwigia repens newer growth is a little winkled look or something.

no other plants shows similar symptoms.

the thing that confuses me is i already dose 2x 1/4 tsp of micros, this is alot i thought. tank is non co2 non excel.

I think i am going to need to dose my tank as if it were co2 enriched. seems like my plants are pretty demanding for being lowtech.



The crinkles in the leaf? That's a symptom of manganese toxicity known as "crinkle leaf" where it prevents calcium from moving through plant tissue. This is not a true calcium deficiency but an induced deficiency caused by excess manganese.

"The “crinkle-leaf” symptoms are similar to Ca deficiency symptoms, are associated with a decrease in Ca translocation to leaves and are often classified as an induced Ca deficiency (Horst and Marschner, 1978)."

Thus, reducing trace element fertilization is a prudent course of action.
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