Touching The Tank's Water and Excel - The Planted Tank Forum
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post #1 of 8 (permalink) Old 11-04-2015, 04:22 PM Thread Starter
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Touching The Tank's Water and Excel

Do you guys/gals wait 24 hrs for Excel to dissipate before submerging your hands into the tank? Or do people just go right into the tank regardless of when it's been dosed?

After reading that Excel (or glutaraldehyde equivalent) is toxic, I just want to be sure I play it safe.
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post #2 of 8 (permalink) Old 11-04-2015, 04:30 PM
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I just wanted to chime in on Excel. I've heard good, and I've heard bad. So I don't use it. I started fertilizing my plants in a separate tank, and switch them out when I do water changes or clean. That way, I can add all kinds of chemicals including carbonated water, without worrying about the fish.
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post #3 of 8 (permalink) Old 11-04-2015, 04:43 PM
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I have no idea really, but I've heard Glute is used as a sterilizer in medical fields (look up Metricide 14 handling safety/precautions).
No idea if gloves are recommended to be used when handling Glute or not.

I suppose it does matter about the amount (concentration %) of Glute though. But so far, I haven't heard of anyone being harmed by Excel or Metricide 14 on skin contact.
But do look for more certain answers to be sure.
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post #4 of 8 (permalink) Old 11-04-2015, 04:51 PM
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At the levels it ends up once added to a planted tank I think you should think of it was water. It's just not strong enough at that point to hurt. In sanitizing strength (say in a hospital) it gets on people's hands all the time in real life use (even if it shouldn't), and that's orders of magnitude stronger. Your tap water has more strong sanitizer (chlorine or similar) in it than this dilute form of glute.

Bear in mind the fish are living in it without any effect.
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post #5 of 8 (permalink) Old 11-04-2015, 06:58 PM
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At the maximum water change dose (5mL per 10gal), you've got a 5:37,854 ratio of Excel to tank water, or about 0.013%. At a 1.7% glutaraldehyde concentration, that's about 0.000221% glutaraldehyde if I did the math right. I think you'll be okay
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Last edited by kevmo911; 11-04-2015 at 07:13 PM. Reason: 5:37k, not 1:37k. Mistyped, but did the math correctly. Maybe.
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post #6 of 8 (permalink) Old 11-05-2015, 08:31 AM
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Quote:
Originally Posted by kevmo911 View Post
At the maximum water change dose (5mL per 10gal), you've got a 5:37,854 ratio of Excel to tank water, or about 0.013%. At a 1.7% glutaraldehyde concentration, that's about 0.000221% glutaraldehyde if I did the math right. I think you'll be okay
Math checks out

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post #7 of 8 (permalink) Old 11-05-2015, 08:58 AM
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Excel is dangerous in its concentrated form, but not in aquarium water due to dilution. However, Your Aquarium Can Be Source of Skin Infections (Mycobacterium marinum). So, best to always wear http://smile.amazon.com/gp/product/B001PBEJ00?psc=1&redirect=true&ref_=od_aui_detailpages00 when putting your hands in the aquarium, especially if you have any cuts or scratches.

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post #8 of 8 (permalink) Old 11-05-2015, 01:04 PM Thread Starter
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Thanks everyone. I feel safer now.
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