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Old 11-03-2008, 03:58 PM   #131 (permalink)
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Default Re: glutaraldehyde instead of excel

I went ahead and bought 2 gallons of Metricide from Richmark Medical, cost $38.54 shipped.

It may not be the cheapest source of glutaradehyde, but it's ready to go, straight out of the
bottle, and it measures just like Excel, 1 ml per 10 gallons water as a source of organic carbon.
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Old 11-05-2008, 07:16 PM   #132 (permalink)
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Default Re: glutaraldehyde instead of excel

I picked up a quart of Metricide 28 and started dosing tonight. I have a 38 gallon heavily planted, with a few strands of hair algae that came from some plants I got online as well as the beginnings of BBA on a few decorations (I have kids...pirate and treasure chest) and starting on my powerhead.

I do weekly 50% water changes on Sunday but did not get the glut until today, so I will start with a daily dose of 15ml and do a 30ml dose at water change time this sunday. I also EI dose using greg watson dry ferts daily.

I will post my results. I have a small school of red eye tetras, 2 kuhli loaches, a dwarf pleco and a molly that has lived through everything. I am sure they'll be fine based on what im reading here but I will keep an eye out.

Also, anyone think it benefits to dose before lights on, after lights out, or it doesnt much matter? I was thinking it might be more beneficial after lights out but there is no science to that theory, just my brain working in its strange way.


Mike
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Old 11-07-2008, 03:53 PM   #133 (permalink)
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Default Re: glutaraldehyde instead of excel

Well, plants still need light to convert the GA to sugars...
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Old 11-10-2008, 05:36 AM   #134 (permalink)
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Default Re: glutaraldehyde instead of excel

Good point...ill try to remember to add it in the morning when I fertilize.

On a side note, why is this forum so dead?
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Old 11-10-2008, 05:41 AM   #135 (permalink)
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Default Re: glutaraldehyde instead of excel

Is the AGA convention going on now maybe?

PS Dennis- if you are still following this thread-- HI! How are ya?
penny

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Old 11-10-2008, 09:01 AM   #136 (permalink)
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Default Re: glutaraldehyde instead of excel

Quote:
Originally Posted by mshilling View Post
On a side note, why is this forum so dead?
You may wanna try here for a little more active SWOAPE Forum
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Old 12-04-2008, 12:11 PM   #137 (permalink)
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Default Re: glutaraldehyde instead of excel

In Columbus Ohio you can get metracide at
http://online.boundtree.com/store/pr...=552-10-2800EA

for 27.80 a gallon
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Old 01-08-2009, 02:36 AM   #138 (permalink)
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Default Re: glutaraldehyde instead of excel

Did any of you, Glutaraldehyde users, ever noticed a lowering, or even vanishing concentrations of NO3?
When noticed that, we tested even in a bucket of water, only with some KNO3, and after adding some Glutaraldehyde, concentration as lowered too much!
Could be a reaction from both, or a change in the testing parameters?

Regards,

Livio

P.S. Not registered with Excel, just when using Glutaraldehyde

Last edited by livionakano; 01-08-2009 at 02:44 AM..
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Old 01-29-2009, 08:20 PM   #139 (permalink)
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Default Re: glutaraldehyde instead of excel

Bump
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Old 01-30-2009, 02:16 PM   #140 (permalink)
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Default Re: glutaraldehyde instead of excel

Quote:
Originally Posted by livionakano View Post
Did any of you, Glutaraldehyde users, ever noticed a lowering, or even vanishing concentrations of NO3?

When noticed that, we tested even in a bucket of water, only with some KNO3, and after adding some Glutaraldehyde, concentration as lowered too much!
Could be a reaction from both, or a change in the testing parameters?

Regards,
Livio
P.S. Not registered with Excel, just when using Glutaraldehyde
This is an absolutely fascinating observation and seems to support my suspicions!

The way plants incorporate nitrogen into their tissues is by using an enzyme called glutamine synthase to make glutamine in the following reaction:
(NH4+) + Glutamic acid ----glutamine synthase ---> glutamine

Glutamic acid looks like this:

and glutamine looks like this:

Gluteraldehyde (excel) looks like this:


Just look at the similarity between gluteraldehyde and glutamic acid and glutamine! The drop in nitrates makes total sense because the plant must be using gluteraldehyde as a backbone for adding nitrogen to. This is probably why the nitrate levels in the water drop after adding gluteraldehyde, because the plant can absorb more nitrogen without having to waste energy making the backbone for it.

I wonder if instead of being a CO2 substitute, is gluteraldehyde really just helping the plants absorb nitrogen faster (and therefore helping them grow faster)? After all, if it was providing CO2 then it would drive photosynthesis faster and produce pearling, and I have never seen plants pearl after adding excel, nothing like adding CO2 and seeing pearling.
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