Metricide - The Planted Tank Forum
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post #1 of 4 (permalink) Old 02-14-2013, 02:52 PM Thread Starter
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Does anyone know if Metricide 14 day work after the expiration date?

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post #2 of 4 (permalink) Old 02-14-2013, 04:06 PM
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I believe it will work. The expiration date is only for if u mix the small package with the 14.
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post #3 of 4 (permalink) Old 02-14-2013, 07:57 PM
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Originally Posted by In.a.Box View Post
I believe it will work. The expiration date is only for if u mix the small package with the 14.
That being said, do not mix the small package with the glutaraldehyde


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post #4 of 4 (permalink) Old 02-15-2013, 01:59 AM
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There is ALSO an expiration date printed on the gallon bottle. I believe this is what Shiggy is inquiring about, rather than use of the activator.

It's funny this question comes up now, because I have a bottle of Metricide 14 purchased 2.5 years ago, which expired April 2012. And just two days ago I checked it with a Hach GT-1 Glutaraldehyde Test Kit. It's only lost about 15% of its potency. It still grows plants, and kills algae when overdosed, just as expected.

So I'd say expired Metricide is OK.
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