what does an excel overdose look like!?!?!?! - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 07-23-2007, 04:14 PM Thread Starter
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what does an excel overdose look like!?!?!?!

i dosed my excel befor my morning shower as usual, when, about 30-35 mins after i dosed my fish were at the surface gasping like mad!!! ine discus died, along with a kuhli and a cardinal tetra .

i know that it sounds like a co2 oversaturation problem but my drop checker was green like it always is.

any thoughts?


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post #2 of 9 (permalink) Old 07-23-2007, 05:40 PM
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I don't think the drop checker is able to read excel.

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post #3 of 9 (permalink) Old 07-23-2007, 05:48 PM Thread Starter
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Quote:
Originally Posted by eklikewhoa View Post
I don't think the drop checker is able to read excel.
this i know. my drop checker was a nice green color, which denotes a good/safe level of co2 in the tank, thats why i dont think it was co2 oversaturation.

so the only other thing that could have caused the death/gasping would be excel. im just not sure if this is how fish respond to an overdose. i have never had a co2 oversaturation problem but what i have read the fish gasp at the surface of the water.

just wondering if the same response is evoked for an excel overdose, as in a co2 overdose.


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post #4 of 9 (permalink) Old 07-23-2007, 05:53 PM
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yes it's the same

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post #5 of 9 (permalink) Old 07-23-2007, 06:06 PM
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how much excel did you use, and how big is the tank?

I have accidentally used a capful (5ml?) of excel on a 5g tank full of endlers and did not see a single negative reaction. I didn't even realized the mistake until later that day, and only then did I do a 50% water change (to be safe, even though not a single fish/moss suffered).

I would imagine you would need to put a large amount excel to get cardinals to start gasping

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post #6 of 9 (permalink) Old 07-23-2007, 06:13 PM
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I think that I read somewhere that excel drops the amount of dissolved oxygen water can hold. But dont quote me.

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post #7 of 9 (permalink) Old 07-23-2007, 07:16 PM
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OD'ing Excel can kill your fish, but IME you have to use a lot of it! If they are gasping at the top you should do an immediate and large PWC.

I have done daily 2x overdoses (the larger initial/after PWC quantity) for 2+ weeks to eradicate algae with no ill effects on my fish. Of course the plants were pearling like crazy - so I am sure I did not have an O2 problem. If your plants are not pearling you may have a lower threshold for dosing Excel.
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post #8 of 9 (permalink) Old 07-23-2007, 07:30 PM Thread Starter
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i went home about an hour ago to see how everything was going. all was good discus were mid water, cardinals were nice and bright, no floaters!!!!

before i left for work this morning i took out about 4g of water and replaced 2g, i also turned my spray bar upward to create more surface agitation, and ran an air pump line under the spray bar.

changed 50%-60% water yesterday and dosed a cap and a half per the bottle instructions (5ml for 20g after a large wc) and this morning im pretty sure i only dosed 1/2 a cap per the instuctions (1 cap for 50g already dosed tanks). never know though it takes me a couple hours to fully awaken.


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post #9 of 9 (permalink) Old 07-23-2007, 08:09 PM
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I used to have pretty frequent fish gasping, especially after large WCs. At one time, I suspected my Excel as well (I was thinking it might have expired or some such). I recently added an air mister which turns on when my CO2 turns off. Since then, I've not noticed a single problem. So, in my case, I think I was typically running at lower than desired O2 levels.

So, in my case, adding O2 injection seems to have helped.
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