Looks like iron deficiency - The Planted Tank Forum
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post #1 of 18 (permalink) Old 07-16-2012, 03:50 AM Thread Starter
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Looks like iron deficiency

It looks like my sunset hygros are having yellow leaves on new growth. Is this a sign of iron deficiency? I will try to get pics later because I'm at work right now.

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post #2 of 18 (permalink) Old 07-16-2012, 08:55 AM Thread Starter
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I could not get a good picture with my crap camera and because the water is really dark from tannin. I have some potting clay laying around. Is this a good source of iron? Im thinking about making tiny clay balls and shove them under the substrate.

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post #3 of 18 (permalink) Old 07-16-2012, 10:21 AM
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Yeah me too gonna say dat it will be helpful for us to tell by looking at d images below. Without d images I am able to tell you something apt. Cary on wid your work and wenever u find time just post some relevant images so dat it becomes easier to speak something.

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post #4 of 18 (permalink) Old 07-16-2012, 02:06 PM Thread Starter
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The pics wont do any good. The whole plant has the same color. I can only tell the difference when viewed in person. Im not sure if it is indeed yellow or maybe the tannin stained is making it look yellow. Just in case, will clay be a good source of iron?

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post #5 of 18 (permalink) Old 07-16-2012, 02:13 PM
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You will get much better help if you list everything you can about your aquarium. Aquarium size, type of lights, what you fertilizers you are dosing, co2 ,and a picture would help us inderstand how heavily planted it is, even if it isn't a good pic.

Standard 10 Gallon (20 x12x12).
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post #6 of 18 (permalink) Old 07-16-2012, 02:40 PM Thread Starter
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Ah, sorry i forgot about that. I was thinking that you guys know my setup since I made a previous thread about nitrates. Silly me.

18 gallon low tech, not heavily planted
No CO2, no ferts
Mineralized soil substrate with gravel cap
(2)8 watt T5NO + (2)9 watt screw in CFL

If I try to take a picture, the colors cant be distinguished from one another due to my crap camera and tannin stained water(almost blackwater).

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post #7 of 18 (permalink) Old 07-16-2012, 03:40 PM
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Low nitrates can cause yellow and pale new growth as well as iron.
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post #8 of 18 (permalink) Old 07-16-2012, 05:31 PM
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Quote:
Originally Posted by jgb77 View Post
Low nitrates can cause yellow and pale new growth as well as iron.
John
+1 on what John said

white growth is related to iron as well

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post #9 of 18 (permalink) Old 07-17-2012, 01:17 AM Thread Starter
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Im gonna ask this again. Will potting clay be a good source of iron? Im thinking of making some balls of clay and shove it down the substrate.

I'll just feed more to increase my nitrates or maybe remove some plants.

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post #10 of 18 (permalink) Old 07-17-2012, 02:02 AM
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Quote:
Originally Posted by specks View Post
Im gonna ask this again. Will potting clay be a good source of iron? Im thinking of making some balls of clay and shove it down the substrate.

I'll just feed more to increase my nitrates or maybe remove some plants.
potting clay will mostly benefit the rooted plants, IME most stem plants consume less from substrate and they look for liquid based fertilizer in the water, its always good to have both. but i suggest trying adding liquid based Fe and Nitrate. if your substrate is high in CEC then dont worry about adding any clay.

its better if you could give us more detail about your setup from A-Z

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post #11 of 18 (permalink) Old 07-17-2012, 02:13 AM Thread Starter
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  • 18 gallon low tech
  • No CO2, no ferts
  • Mineralized soil substrate with gravel cap
  • (2)8 watt T5NO + (2)9 watt screw in CFL - 9 hours daily with 1hr break during midday
  • "Experimental" wet-dry filter
  • Fauna: 2" angelfish(stunted, long story), 10 neons, 4 zebra danios and a few quilted Melania
  • Flora: Jungle Val, Bacopa Carolina, Java moss, hygrophila corymbosa, sunset hygro

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post #12 of 18 (permalink) Old 07-18-2012, 09:56 AM Thread Starter
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I've looked around the net and found two sites saying that tannin is incompatible/interferes with iron absorption.

http://en.wikipedia.org/wiki/Tannin
http://sickle.bwh.harvard.edu/iron_absorption.html

Looks like this is the cause of the yellowing of my sunset hygros. I should do more water changes and add in activated carbon since I cant find any purigen locally and this stuff is really pricey to have it imported. I currently do 10% WC every 2 weeks. How far can I push this up?

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post #13 of 18 (permalink) Old 07-18-2012, 01:02 PM
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tannins don' affect iron absorption to a degree that you'll find deficiencies. i have tea for water in ym shrimp tank from Indian almond leaves and my plants grow fine

i'd look further into how are the root systems on the plants. dirt can be peculiar in how it grows plants.. but one fact remains. its LOADED with all the nutrients necessary and slightly acidic so will allow plants to abosrb all the nutrients neccessary. light, and flow are more than likely key factors here

i have had a dirt tank as well and it releases tons of tannins and never once did that affec the plants growing there

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post #14 of 18 (permalink) Old 07-18-2012, 01:33 PM Thread Starter
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Hmm. I've once made a thread about my lighting setup and hoppy said its should give a par equivalent of low light or possibly low-med. The flow is really good in my tank, no dead spots and at least 5x turnover rate. I put more food in the tank to increase my nitrates but not to a point of overfeeding. So far I have not seen any significant increase yet but it has only been two days. It kinda gets frustrating now. I cant seem to find out what is wrong.

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post #15 of 18 (permalink) Old 07-18-2012, 02:18 PM
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I'm not sure increasing fish food is a good way to try to increase ferts. I really think you should test your nitrates and phosphates, and dose a weekly dose of Flourish Comprehensive.

Standard 10 Gallon (20 x12x12).
Low tech, Sand substrate.
Eheim 2211, and Aqueon Quietflow 10.
Finnex Stingray LED, 20" above substrate
2 Anubias Nana Petite, Christmas moss.
4 Halequin Rasborahs, 5 RCS.
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