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post #1 of 6 (permalink) Old 07-13-2012, 10:37 AM Thread Starter
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fertz and dead fish

hey guys ive seen this being discussed before but always got mixxed answers ive just started to use excel and noticed that my ottos started bugging out after well this morning 2 were dead and not sure if this is the cause so i turn to you the community has anyone ever experience killing fish using excel or any other aquarium plant fert?
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post #2 of 6 (permalink) Old 07-13-2012, 10:52 AM
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Excel is not a "fert" so to speak, its a chemical compound known an glutaraldehyde. Its used in lots of applications in the medical field to disinfect. Its also an algae killer and plants have the ability to pull Carbon from it. Ferts would be your Macro and micro nutrients. If you OVER DOSE the Excel yes it can be toxic to your fish. You will find though that normal ferts are rarely if EVER responsible for the death of livestock as a concentration in the water.

How much did you dose of the excel?

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post #3 of 6 (permalink) Old 07-13-2012, 11:54 AM
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Probably thousands dose dry world wide without issue. I use to add ferts dry but on accident dosed with the pumps off and the water calm. The chemical salts sank and landed on the plants in concentrate. Burned the plants killing growth to the base node. I've lost young fish that were seen grabbing the granules and spitting it back out. Quit dosing dry when I foolishly (in a hurry on my schedule) did it more than once. Who here is perfect? Pumps turned off to feed the fish I've later gone to bed forgetting to turn the filter back on. Nothing perfect about me.

Did you dump in to much Excel?
Even added at hugely over the recommended amounts I don't remember reading of it killing critters just melting some plants.


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post #4 of 6 (permalink) Old 07-13-2012, 01:27 PM
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What size tank and how much did you dose?

Is the tank cycled? What are the parameters (ammonia, nitrite, nitrate)? What's your water change schedule? Those are things that should be considered as well.
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post #5 of 6 (permalink) Old 07-13-2012, 01:35 PM
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Odds are good that it was something else. While it is good to test the water when anything happens to fish, there are several things that can kill fish that we don't often measure. Did you notice any odd action from the fish? Low O2 levels can make fish go to the top and gasp even though the water tests good in other ways. Make sure the water is moving from bottom to top and not getting a film on top where water is not moving. That can cut off air and gas exchange and kill pretty quickly.
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post #6 of 6 (permalink) Old 07-13-2012, 09:44 PM Thread Starter
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Got a 180 started with a low tech tank but was getting bored so recently started excel
All my perimeters are ph 6.8 ammonia 0 nitrite 0 nitrate 0
I only have ottos and amano shrimp in it so far and they don't seem to be gasping for air they (ottos) just run into things and speed race through the tank
I dose

2capfuls excel everyday
2capfuls flourish 1x week
1teaspoon equalibrium 1xweek
1teaspoon nitrate 1x week
1/4 teaspoon phosphate 1xweek
Never dose drys on the same day
And only when I dose with excel I see my shrimp stay on driftwood for a few hrs and my ottos bug out
am I dosing to much ?
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