White leaves...cause?
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Old 03-27-2013, 01:35 PM   #1
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White leaves...cause?


So I have some plants that are have leaves on the top that are turning white. Specifically ludwigia.

Did some research and it looks like iron or calcium may be lacking. Does anyone know about this?

Right now I'm dosing KH2PO4 & KNO3 according to the EI dosing index found on Toms site. Also have osmocote tabs in.

Temp: 78
Ph: 7.2
Nitrite: 0
Nitrate: 30
Gh: 200ppm
Kh: 140ppm

Have flourish IRON and Comprehensive at my disposal.

What do I need to do to fix it?


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Old 03-27-2013, 03:13 PM   #2
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Could be CO2, NO3 or Iron. Probably not calcium, you would see twisted pale growth more yellow than white.

How's your CO2?
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Old 03-27-2013, 03:27 PM   #3
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Default White leaves...cause?

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Originally Posted by homemadepopcorn View Post
Could be CO2, NO3 or Iron. Probably not calcium, you would see twisted pale growth more yellow than white.

How's your CO2?
Just started it about 5 days ago. Pressurized at almost 1 bps.

Maybe more iron will help?


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Old 03-27-2013, 03:50 PM   #4
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You may need to turn it up more... but I don't know how big the tank is. Bubbles generally aren't the best way to gauge CO2 levels.

You can go for the Iron as prescribed by the instructions.
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Old 03-27-2013, 04:21 PM   #5
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Quote:
Originally Posted by Mumford View Post
Just started it about 5 days ago. Pressurized at almost 1 bps.

Maybe more iron will help?


- Mumford

Did you increase dosing when you increased co2? EI is based on non-limiting levels of nutrients. If you're still dosing pre-co2 levels, I would increase dosage. Remember, its easy to supply more than the plants can use and just remove it at the end of the week with water changes.

It will take some time to dial in the co2. Small changes to rate when you are around to monitor livestock. Also remember that as plant mass increases, so does demand for nutrients.
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Old 03-27-2013, 05:12 PM   #6
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Default White leaves...cause?

Quote:
Originally Posted by homemadepopcorn View Post
You may need to turn it up more... but I don't know how big the tank is. Bubbles generally aren't the best way to gauge CO2 levels.

You can go for the Iron as prescribed by the instructions.
It's only a 5 gallon

Drop checker is on the very light green. Working on getting it a bit higher


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Old 03-27-2013, 05:14 PM   #7
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Default White leaves...cause?

Quote:
Originally Posted by Adam C View Post
Did you increase dosing when you increased co2? EI is based on non-limiting levels of nutrients. If you're still dosing pre-co2 levels, I would increase dosage. Remember, its easy to supply more than the plants can use and just remove it at the end of the week with water changes.

It will take some time to dial in the co2. Small changes to rate when you are around to monitor livestock. Also remember that as plant mass increases, so does demand for nutrients.
Well I actually started dry frets just after adding the CO2 and brighter light. I'll make sure and keep adding ferts to see what happens with the colors


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Old 03-27-2013, 05:26 PM   #8
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IME it is related to K+ and Mg and if you are already dosing a Fe, combining all these three will bring in those normal color back again, go easy if you are using DTPA type Iron, if you are using CSM+b or Flourish iron then you can dose it extra since they don't last in the water for very long.
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Old 03-27-2013, 05:40 PM   #9
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Default White leaves...cause?

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IME it is related to K+ and Mg and if you are already dosing a Fe, combining all these three will bring in those normal color back again, go easy if you are using DTPA type Iron, if you are using CSM+b or Flourish iron then you can dose it extra since they don't last in the water for very long.
I have the Flourish Iron so I'm good there.

However I don't have K+ or MG other than in a micro mix. Should I just dose extra of that?


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Old 03-27-2013, 09:01 PM   #10
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Quote:
Originally Posted by Mumford View Post
I have the Flourish Iron so I'm good there.

However I don't have K+ or MG other than in a micro mix. Should I just dose extra of that?


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dont dose too much Flourish, i seen it cause hair algae if dosed too much, just dose 10ppm K+ weekly and 0.5ppm Mg 3x weekly when dosing Iron.

Potassium sulphate is very cheap and so is Magnesium sulphate.
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Old 03-28-2013, 01:59 PM   #11
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Default White leaves...cause?

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dont dose too much Flourish, i seen it cause hair algae if dosed too much, just dose 10ppm K+ weekly and 0.5ppm Mg 3x weekly when dosing Iron.

Potassium sulphate is very cheap and so is Magnesium sulphate.
Good to k kw!

If I already have potassium nitrate do I need potassium sulfate too? Or could I get by with just the magnesium sulphate?


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Old 03-28-2013, 02:47 PM   #12
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Quote:
Originally Posted by Mumford View Post
Good to k kw!

If I already have potassium nitrate do I need potassium sulfate too? Or could I get by with just the magnesium sulphate?


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if you dose KNO3 then you dont need extra K+, i dose extra because it increase the uptake of NO3. you dont get any K+ from magnessium
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