Chlorine toxicity - Fertilizing - Aquatic Plant Central

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Old 04-27-2005, 08:51 PM   #1 (permalink)
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Default Chlorine toxicity

Here is a picture of Limnophila aromatica damaged by chlorine from the tap. The new leaves are curled and small. This abnormality was not happening when the tap was filtered over a carbon cartridge.



Do you have similar experience?

Edward
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Old 04-27-2005, 09:04 PM   #2 (permalink)
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This happened to leaves that were already normally formed? What were the circumstances surrounding it? I've left plants in chlorinated tap water plenty of times and have never seen anything like that. Then again, not all tap water is the same...

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Old 04-27-2005, 09:20 PM   #3 (permalink)
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Hi Cavan

This top section developed after the chlorinated water change in the following 3 days. Old growth was not effected. Before that, water changes were done frequently to avoid rapid water parameter change over the carbon cartridge. The lighting was 2Wpg PC in reflector above 50gall aquarium.

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Old 03-30-2006, 11:08 AM   #4 (permalink)
 
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Carbon removes more than just chlorine. Has the hardness changed at all?
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Old 04-07-2006, 06:51 AM   #5 (permalink)
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Hi Robert
Carbon filtration has no effect on hardness.
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Old 04-11-2006, 02:50 AM   #6 (permalink)
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I have very similar effects on some leaves. I use CaCl2 to reconstitute RO water. Ca is about 20ppm and chloride 35ppm. It seems to me it is too high.
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Old 04-11-2006, 07:40 AM   #7 (permalink)
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It seems that some controls need to be setup before concluding that Chlorine is the culprit. I'm not saying that you're wrong, Edward, but it would give you a much stronger argument to make controls. Although impossible, since tap has lots of things in it, would be to remove the chlorine only from the tap while leaving everything else and seeing if there's a change in the growth habbit. For another control I would take your carbon filtered water, which has shown good growth, and replenish it with chlorine, and then look at the effects. And finally, to isolate chlorine, I would take R/O water, replenish it with chlorine at varying doses from 1-50 ppm and see if there's a differential effect based on the concentration of chlorine to the growth habit of your plants. Lots of work.... but just thoughts...

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Old 04-11-2006, 01:06 PM   #8 (permalink)
 
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Quote:
Originally Posted by Edward
Hi Cavan

This top section developed after the chlorinated water change in the following 3 days. Old growth was not effected. Before that, water changes were done frequently to avoid rapid water parameter change over the carbon cartridge. The lighting was 2Wpg PC in reflector above 50gall aquarium.

Edward
What was the Chlorine or Chloramine levels in the tap and what fraction of water change did you do, eg what were the levels in the tank and time of exposure??

New growth impacts of chlorine have several potential issues.


Regards,
Tom Barr

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Old 04-11-2006, 01:17 PM   #9 (permalink)
 
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Quote:
Originally Posted by kekon
I have very similar effects on some leaves. I use CaCl2 to reconstitute RO water. Ca is about 20ppm and chloride 35ppm. It seems to me it is too high.
No, don't assume these two are the same, they are not.

Free Chlorine and Chloride anions are very different toxicologically.

Let me ask a simple question, what's the difference between a chloride anion and chlorine anion?

Hint : it has to do with gaining an electron.

Regards,
Tom Barr
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Old 04-12-2006, 11:57 PM   #10 (permalink)
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Hi, Im actuall replying to the origional post . I have had this happen in my tank htis week. Green hygro tops after a water change 50%. Look the same as your leaves curling downward. This phenomanon shows up in the morning and is gone by the time i get home from work. Happens only after a water change now that u mention it.
What type of tapwater conditioning additives are good to use with our planted tanks?
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