liquid co2 (Glutaraldehyde) dosing - The Planted Tank Forum
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post #1 of 19 (permalink) Old 08-03-2011, 04:09 AM Thread Starter
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liquid co2 (Glutaraldehyde) dosing

Hi everyone,
i had a co2 cylinder blast at my place, due to which my parents got angry and told me to get rid of it. i searched on the internet and found out that many of them are using Glutaraldehyde for co2 dosing as flourish excel falls expensive in longer term. has anyone ever got any experience with it? also want to know the dosage as its very concentrated.
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post #2 of 19 (permalink) Old 08-03-2011, 05:20 AM
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"Very concentrated" isn't very useful. If I remember correctly, Seachem Excel is 1.5-1.6% glut. I'm using Metricide 14 that was diluted to 1.5% with ro/di water. Smells like Excel, seems to work like Excel.

BTW it's not liquid co2, that thing is dangerous. Glut based products are just a carbon replacement for our use.

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post #3 of 19 (permalink) Old 08-03-2011, 05:31 AM Thread Starter
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What is Metricide 14?
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post #4 of 19 (permalink) Old 08-03-2011, 06:19 AM
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It's a brand of glutaraldehyde based cleaning agent that is used on sensative materials when other means of cleaning it would damage the equipment. Also it's cheap, about $30 USD for 1 gallon, including shipping. Since you're in India, I don't know what products are available there sorry

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post #5 of 19 (permalink) Old 08-03-2011, 06:21 AM
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Its also available at higher concentrations, but you'll need to dilute it down. Its a very dangerous chemical, so if you decide to purchase the higher concentrations you need to be careful to not inhale too much or spill it on your skin while handling it.
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post #6 of 19 (permalink) Old 08-03-2011, 06:24 AM
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Check this thread which I recently started. Overstocked and SeattleAquarist offer lots of knowledge regarding Glutaraldehyde.

Most important thing to note is that is the concentration of your glut source. And then make sure to dilute it properly. If your high-school chem and algebra are failing you, Seattle provides an awesome excel workbook that does the calculations for you.

And remember... Glut is a nasty chemical... so be safe!

I bought a bunch of amber chemical storage bottles, 60 mL syringes and graduated cylinders for all my diluting needs from homesciencetools.com. Really great prices.


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post #7 of 19 (permalink) Old 08-03-2011, 07:08 AM Thread Starter
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has it really worked for people who use this instead of co2? my moss i growing well but im worried about plants that require high co2. will this do the job?
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post #8 of 19 (permalink) Old 08-03-2011, 11:02 AM
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It's better than nothing, but is not a replacement for CO2. I think you'll find most just use it to spot dose algae.
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post #9 of 19 (permalink) Old 08-03-2011, 05:16 PM Thread Starter
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will plants like glossostigma, hemithus cuba and other co2 demanding plants grow?
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post #10 of 19 (permalink) Old 08-03-2011, 05:31 PM
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It's more of a very poor substitute for, than an alternative to, pressurized CO2. And no plants that normally are very CO2-demanding will work well with just glut.
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post #11 of 19 (permalink) Old 08-03-2011, 05:33 PM
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How did your co2 tank burst? Tanks don't burst. Ever. Did the regulator fail? What?

Glut is a poor substitute for co2 and in a high tech system it is a good way to fail.
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post #12 of 19 (permalink) Old 08-03-2011, 05:49 PM
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Did you just get it filled? Sometimes they overfill them and then it could have blown the emergency release valve (or whatever that thing is called).
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post #13 of 19 (permalink) Old 08-03-2011, 06:16 PM
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At least here I think CO2 is far safer than using the chemical.
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post #14 of 19 (permalink) Old 08-03-2011, 08:44 PM
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I'd use DIY yeast co2 depending the size of your tank.

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post #15 of 19 (permalink) Old 08-03-2011, 09:26 PM
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You can also do paintball. Keep the regulator you had on your cylinder, get a paintball adapter and a couple 20oz paintball cylinders, and that might be less offensive to your parents
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