Should you avoid putting hand in tank after fertilizing? - The Planted Tank Forum
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post #1 of 5 (permalink) Old 09-06-2012, 04:03 PM Thread Starter
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Should you avoid putting hand in tank after fertilizing?

I've heard Flourish Excel is VERY toxic and you should not get it on your hands.

Should I avoid putting my hand in my tank after dosing with Flourish Excel or Flourish Comprehensive? If so, how long should I wait?

thanks, Doug
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post #2 of 5 (permalink) Old 09-06-2012, 04:14 PM
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Excel and Comprehensive are two different things. Excel is a carbon substitute for plants. Comprehensive is basically a liquid fert. Excel is not toxic but antiseptic??? Applying full strength excel directly onto the leaves of the plant would most likely damage the cell walls. However, it would kill BBA. A little dip by your finger won't do a thing to your fish or your plants.

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post #3 of 5 (permalink) Old 09-06-2012, 04:35 PM
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Excel is toxic. Perhaps diluted in the tank it wouldn't be an issue but definitely wash well if you get some on your hands that isn't diluted.
Here is the MSDS.

Here is Seachem comprehensive. Apparently it is a bad idea to drink large amounts so don't drink it. Diluted with tank water drink away.

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post #4 of 5 (permalink) Old 09-07-2012, 03:16 AM
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Skin contact when these are diluted in the aquarium is not a problem.

As a general rule, though I do wash my hands and arms in hot, soapy water after dealing with the aquariums. There are worse things that might be in there.
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post #5 of 5 (permalink) Old 09-07-2012, 04:46 PM
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You should be washing your hands and arms with warm water and soap after being in the aquarium anyways, so I wouldn't fret about the ferts/excel
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