Glutaraldehyde calculator - The Planted Tank Forum

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post #1 of 35 (permalink) Old 11-11-2011, 01:55 AM Thread Starter
wet
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Glutaraldehyde calculator

Hey folks. I needed to make a Glut. solution, so built this. Maybe you'll find it useful, too. It'll clone popular Carbon sources (1.6% Glut) with Cidex, Metricide, or Glut. of various %'s.

http://glut.petalphile.com

It only requires Javascript and a modern browser. Have fun!

Last edited by wet; 11-11-2011 at 06:49 AM. Reason: decided it was prudent to leave any manufacturer names out of this post.
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post #2 of 35 (permalink) Old 11-11-2011, 01:57 AM
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nice

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post #3 of 35 (permalink) Old 11-11-2011, 02:16 AM
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Awesome! This will come in handy for lots of folks. Including myself.

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post #4 of 35 (permalink) Old 11-11-2011, 02:18 AM
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Thank you, this is very nice indeed.
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post #5 of 35 (permalink) Old 11-11-2011, 03:40 AM
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You have to keep that page up forever, now that you've advertised it. Kind of like the original Ohio club posting that talked about substitutes for Excel. Oh, and thank you very much.
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post #6 of 35 (permalink) Old 11-11-2011, 03:56 AM
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How about for Metricide 28...its only different with .1%
I think there is something wrong with your formula...If I ain't mistake to get the same concentration of excel you need to mix 475ml of Metricide with 525 ml of water.....

This is your post in APC right?
http://www.aquaticplantcentral.com/f...8&postcount=26
How come formula changed?

http://www.plantedtank.net/forums/fe...yde-excel.html

Its giving me "Add 615mL of your 2.6% Glutaraldehyde source to the 1000mL container" for a liter, its 140ml of extra Glutaraldehyde then the previous calculation..

None the less I do 50/50.

Cheers!!!
ªJ
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post #7 of 35 (permalink) Old 11-11-2011, 06:09 AM Thread Starter
wet
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Thanks nalu86, Dempsey, Angry the Clown, and dbosman! I'd love any help spreading the link around.

Joraan,

Metrex's MSDS for Metricide indicates it includes surfacants. Are you sure Metricide 28 is safe for the aquarium?

That is my post on APC! This calc had other advantages for me. (I had never built an-all Javascript/CoffeeScript calculator before, and I far prefer webapps to a spreadsheet.)

But I don't know what you're entering into the spreadsheet to get this:
Quote:
If I ain't mistake to get the same concentration of excel you need to mix 475ml of Metricide with 525 ml of water.....
The spreadsheet with 1.5% target for our DIY mix, using a 2.6% Glut. source (Metricide 14) requires ~577mL of Metricide 14 diluted with ~423mL water for a 1000mL DIY solution.

Let's do this together:
(% Glut target) * (mL final solution) / (% Glut in Glut source) = mL Glut. Source to dilute.
1.5% * 1000mL / 2.6% =~ 577mL.

Your proportions make 1.235% Glut. using Metricide 14.

The spreadsheet and this calculator give the same results if you change the Intended Concentration (B7) from 1.5% to 1.6%. I'm not entirely convinced Excel is exactly 1.5% Glut until someone pulls out a spectrometer (and the difference between 1.5% and 1.6% is not significant), Azoo's and EasyLife's recommended dosing are in the same ballpark, and until now I had doubted anyone would freak out over 0.1% of something.
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post #8 of 35 (permalink) Old 11-11-2011, 02:42 PM
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Metricide 28 is safe, I was using Metricide 14 before. Metricide 28 is only 2.5% Glut concentrated.

Using this
"Let's do this together:
(% Glut target) * (mL final solution) / (% Glut in Glut source) = mL Glut. Source to dilute.
1.5% * 1000mL / 2.6% =~ 577mL."

I'm getting 600ml while using above formula :1.5%*1000ml/2.5%= 600ml.

Excel spread sheet answer still remains 475 ml....Now I am really confused.
Good thing I need to mix new batch today. will try 600ml instead of 475ml and see how plant reacts.

Cheers!!!
ªJ
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post #9 of 35 (permalink) Old 11-11-2011, 03:56 PM
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Hi wet,

It looks like you have made a good start on it but it has two issues.

First why are we using 1.6% instead of the Seachem Excel concentration of 1.5% as the target concentration? The resulting concentration is about 7% stronger than Excel and requires 7% more Glut/Metricide/etc to formulate.

The second issue is a "bug". If I indicate I are using 5% Glut as your source solution the result indicates I am using a 10% source solution and indicates an incorrect amount (by 50%) to add.
Bug


Here are some screen shots of the Glut calculator verses wet's calculator for the same volume and concentrations. Disregard the cost/ml and Total columns, they do not apply to this calculation.

I'll stick with the Excel based Glut calculator on my computer at this point; but this is a good start for an online version.

Thanks,
-Roy




Roy
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post #10 of 35 (permalink) Old 11-11-2011, 06:20 PM Thread Starter
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Hey Seattle_Aquarist. Well, I picked 1.6% for the reasons above, but two requests in this thread make me think a lot more folks are married to 1.5% than I am to 1.6%, so you've got it.

Thanks for catching the 5% bug!

Joraan, you've now got Metricide 28.
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post #11 of 35 (permalink) Old 11-11-2011, 06:43 PM
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Hi wet,

It is an excellent first effort, and for those that don't have the ability or inclination to use an Excel based calculator it will be an excellent asset.

Keep up the good work!

Thanks,
-Roy

Roy
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post #12 of 35 (permalink) Old 11-11-2011, 07:18 PM
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Looks great Wet... I agree with the 1.5% but also keep in mind that met 14 and 28 do not contain a consistent % of glut... it varies by production run and volume being sold. You're tool is better off focusing strictly on Glut % of the source glut rather than manufacturer.

Love what you've done so far though!!
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post #13 of 35 (permalink) Old 11-11-2011, 08:08 PM
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this is great. you should add a 45% option.
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post #14 of 35 (permalink) Old 11-12-2011, 12:17 AM Thread Starter
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Hey firefiend and krillkill. I love it: done and done. Thanks!
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post #15 of 35 (permalink) Old 11-12-2011, 01:27 AM Thread Starter
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Attempt for less nerdy, more simple. What do you think?

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