The Planted Tank Forum - View Single Post - Opening Dose of Excel not looking too good
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post #4 of (permalink) Old 12-03-2012, 05:02 PM
Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
Posts: 10,489
If that is so, you have killed a lot of algae, I would do a big water change.
That much matter dying all at once can add too much nitrogen to the tank, the ammonia and nitrite removing bacteria cannot keep up.

Fish piping: I would do a water change.

If the posts above are right, and your tap water comes pre-loaded with algae, I would not dose the high initial dose of Excel. Just do the regular dosing.
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