White Staurogyne Repens - The Planted Tank Forum
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post #1 of 4 (permalink) Old 12-10-2018, 12:06 AM Thread Starter
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White Staurogyne Repens

I let the tank get a bit out of hand for a while - super high light and a ton of co2 but no nutrients.
I had switched to Thrive because I ran out of dry ferts.. then I ran out of Thrive and had to wait a few weeks before I could get anything.. now I'm back to Burr's Mix and the Dry NPK but while I was waiting my S. Repens turned white?

All my other plants are doing good now - been dosing for 2 weeks but I can't get the S. Repens to go green again - some of the new growth is splotchy green/white but a lot of it is still coming out white.
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post #2 of 4 (permalink) Old 12-10-2018, 12:40 AM
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I'd sell it quick as a new rare variety!


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post #3 of 4 (permalink) Old 12-10-2018, 12:48 AM
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Hi @Chlorophile,

I downloaded, enhanced, and enlarged your photos. I also added a couple of arrows.



If you look closely at the photo the arrow to the left is pointing at leaf showing extreme chlorosis (green leaf veins with lighter interveinal areas). What occurred was iron (Fe) was not available to those leaves as they were being formed. Iron is one of the immobile nutrients and cannot be moved within the plant from older leaves to areas of new growth so if there is not sufficient available as the leaf is formed this is what occurs. The S. repens leaves that are white will not turn green, the damage is already done. What you want to watch are the new leaves as they emerge, with sufficient iron the new leaves should form showing the normal green color. The newest leaves on that same stem do appear to be the normal green color.

The second arrow is pointing to a leaf with the classic 'leaf tip hood downward' that indicates adding a little more calcium may be indicated.

Hope this helps!
-Roy
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75 Gallon, 2X55W AH Supply CF 8800K, 1X 59W Fluval Plant (3.0); 45 Gallon Tall, 1X 46W Fluval Plant (3.0); 30 Gallon Long; Fluval F&P 2.0; 20 Gallon, 1X26W AH Supply LED; all with CO2 & (Calcined) Montmorillonite Clay
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post #4 of 4 (permalink) Old 12-10-2018, 02:12 AM Thread Starter
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Quote:
Originally Posted by Seattle_Aquarist View Post
Hi @Chlorophile,

I downloaded, enhanced, and enlarged your photos. I also added a couple of arrows.



If you look closely at the photo the arrow to the left is pointing at leaf showing extreme chlorosis (green leaf veins with lighter interveinal areas). What occurred was iron (Fe) was not available to those leaves as they were being formed. Iron is one of the immobile nutrients and cannot be moved within the plant from older leaves to areas of new growth so if there is not sufficient available as the leaf is formed this is what occurs. The S. repens leaves that are white will not turn green, the damage is already done. What you want to watch are the new leaves as they emerge, with sufficient iron the new leaves should form showing the normal green color. The newest leaves on that same stem do appear to be the normal green color.

The second arrow is pointing to a leaf with the classic 'leaf tip hood downward' that indicates adding a little more calcium may be indicated.

Hope this helps!
-Roy
Thank you! Okay I figure it was Iron or Nitrogen!

My new tap water is harder than at my old house but I also didn't do water changes while I wasn't fertilizing so maybe used it all up!
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