The Planted Tank Forum - View Single Post - Flourish Excel killed all my shrimp
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post #8 of (permalink) Old 03-15-2016, 04:54 PM
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I wish people would REALLY understand what Excel is. It is SeaChem's name for a diluted disinfectant glutaraldehyde. Outside the aquarium trade, i.e. for medical use the common brand name is Metricide.

Section 12. Ecological Information
This product is classified as toxic to the aquatic environment.
Toxicity: No toxicity data available for product.
Glutaraldehyde: LC50 fathead minnow 10.8 mg/L/96 hr; EC50 daphnia magna 0.69 mg/L/48 hr; EbC50
green algae 2.64 mg/L/72 hr.
Persistence and degradability: Glutaraldehyde is readily biodegradable.
Bioaccumulative Potential: Glutaraldehyde: log Kow -0.333, potential for bioaccumulation is low
Mobility in Soil: Glutaraldehyde: highly mobile in soil.
Other Adverse Effects: None known

It is a poor substitute for gaseous CO2, and is known to cause problems with certain plants especially Vals. Some people can get away with it with shrimp some do not.
The only reason I use Excel is to control algae. Other than that, I would not put it in my tank, especially with shrimp.

OK, off my soap box! Rant over!

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