10% Glutaraldehyde Dosing - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 10-18-2011, 01:41 PM Thread Starter
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10% Glutaraldehyde Dosing

I currently have a 3.5gal set up in my student digs. It's a NPT with soil substrate capped with fine gravel and heavily planted with glosso, star grass, and h. verticillata. It is also swamped with blanket weed/ green string algae

I have Glutarol wart treatment in my cupboard, which is a 10% solution of glutaraldehyde in distilled water and methylated spirit. Everyone seems to be using a different strength to me, and I simply don't have the brain to do the maths for the correct dosage, or even dilution. Could somebody please help?
Thanks

Last edited by eaunaturale; 10-18-2011 at 02:31 PM. Reason: spelling mistake
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post #2 of 12 (permalink) Old 10-18-2011, 04:07 PM Thread Starter
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29 views and no reply?
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post #3 of 12 (permalink) Old 10-18-2011, 04:23 PM
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dont know about the 10% concentration but the methylated spirits(Denatured alcohol) will likely be a problem...
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post #4 of 12 (permalink) Old 10-18-2011, 04:46 PM
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I think that Seachem excel is 1.6% glutaraldehyde. Just add 1/6 of excel dosage requirements.
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post #5 of 12 (permalink) Old 10-18-2011, 05:49 PM Thread Starter
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thanks plamski. Will the alcohol not simply serve as a sugar source? I doubt the concentration of it will be that high, compared with the distilled water.
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post #6 of 12 (permalink) Old 10-18-2011, 05:58 PM
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For that, equivalent to a normal daily dose of Excel is 0.0525ml.

Double dose for killing algae is 0.105ml, and so on.

At those tiny dosages, I doubt the methylated spirits will be a problem, but I can't guarantee it. Use at your own risk.

Not to mention it's impossible to measure such a small amount. I'd mix 1/4 tsp. Glutarol with 1 tbsp. distilled water. A daily double dose of that mixture will then be an easy 1/4 tsp.
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post #7 of 12 (permalink) Old 10-18-2011, 05:59 PM
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Quote:
Originally Posted by eaunaturale View Post
Will the alcohol not simply serve as a sugar source?
Maybe. I've heard of that effect with ethyl alcohol (like vodka). This could be isopropyl (rubbing) alcohol. Not sure if that works differently. And when an alcohol is denatured, it's tainted with something to prevent you from drinking it; I hear it makes you throw up. Totally unnecessary in a glutaraldehyde mixture of course, as it's already toxic; but common for rubbing alcohol so people can't drink it and avoid alcohol taxes.
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post #8 of 12 (permalink) Old 10-18-2011, 06:10 PM
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NOTE: Serious error in my math. The correct mix is 1/4 Glutarol and 1 tbsp. distilled water. Edited above and posting this just in case you'd already read the wrong mixture.
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post #9 of 12 (permalink) Old 10-18-2011, 06:16 PM Thread Starter
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Big help, thankyou. It describes the methylated spirits as "industrial", which after a quick google scan, means 5% of the overall alcohol content is methanol. How that effects things, I don't know.
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post #10 of 12 (permalink) Old 10-18-2011, 06:19 PM Thread Starter
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Also, when you say a teaspoon and tablespoon, how many ml is that? I have a 3ml pipette, so can measure small(ish) quantities to a reasonable degree of accuracy.
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post #11 of 12 (permalink) Old 10-19-2011, 12:25 AM
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Aha.. In that case, it's probably easier to work with ml's alone.

Mix 1ml Glutarol with 9ml distilled water. 1ml of that solution is your 3.5G's daily double dose.
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post #12 of 12 (permalink) Old 10-19-2011, 01:15 PM Thread Starter
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Thank you very much!
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