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Old 08-15-2010, 09:56 PM   #1
Gilga
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Flourish Excell and Cherry Reds


I'm waiting for some Cherry Red shrimp to be delivered and I was recently told that excell is basically a poison for shrimp so I was just wanted someone to confirm or deny this. Thanks!
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Old 08-15-2010, 10:04 PM   #2
Eden Marel
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Unless you overdose a lot. I use 2cc on water change day, then 1cc everyday after that for my 5g. It has one RCS.

I do not use Excel in my 10g RCS tank cuz I do not need it.
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Old 08-15-2010, 10:16 PM   #3
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I've dosed 3x the recommended amount with not one loss.
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Old 08-16-2010, 06:56 AM   #4
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As long as you stick to the recommended dosages of Excel, your RCS will be fine.
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Old 08-16-2010, 06:57 AM   #5
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I too am concerned with the conflicting information on Seachem's Excel. I like their products, and use quite a few of them. I don't have CO2 in my tank yet, as I'm just getting it up and settled. I have musssels, clams, an ARMY of CRS, ghost shrimp, a new unidentified variety of shrimp (looks like ghost, with visible organs from thorax to tail), snails, plants, frogs, and even a few fish!

My point- I am scared to use this stuff now. Per label direction, or not, I read someones post citing university research indicating the chemical in Excel is basically poison!
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Old 08-16-2010, 07:13 AM   #6
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you could always contact seachem and get their opinion...
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Old 08-16-2010, 03:30 PM   #7
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Just like EI dosing, you will hear conflicting issues with Excel and shrimp. For me, I think there is little evidence stating that either is lethal or non-lethal to shrimp.

You will always get information that will vary, and honestly, I have yet to see any scientific data that states that either EI dosing or Excel harms shrimp or stunts their growth. Because of that, a lot of shrimp keepers would rather take the safe route when using Excel, or any other chemical that there is no actual proof to. Now there are plenty of personal experiences with Excel and negativity, while others will say there is none. It is really up to the individual to see what they are comfortable with using and not using.

I, for one, wouldn't use it just as I have a regimen that entails that I refrain from adding many chemicals to my water column. This is more of a safety procedure with my shrimp, as some of they cost upwards of $30 per. However, I do use co2 in my larger tank, albeit DIY at the moment and most will tell you not to use co2 with shrimps as well.
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Old 08-16-2010, 06:15 PM   #8
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A long debated discussion. I don't do it, just out of paranoia. But lots of people do, with reports of no harm. I would at least wait till the shrimp have settled in.
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Old 08-16-2010, 07:58 PM   #9
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here is what seachem said to me, pretty much what I thought.. Safe at recommended dose, unsafe on overdose.
Quote:
******Thank you for your questions concerning Flourish Excel. *When used as directed, Flourish Excel is completely safe for your shrimp. *Because it is a reducing agent, overdosing is not recommended, but at the normal dose it will not harm your shrimp in any way. *Excel can be used alone or in conjunction with CO2, depending upon the needs of the plants that you are keeping. *We hope this helps, and let us know if you have further questions. Have a nice day!
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Old 08-16-2010, 08:57 PM   #10
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Quote:
Originally Posted by fishnovice View Post
My point- I am scared to use this stuff now. Per label direction, or not, I read someones post citing university research indicating the chemical in Excel is basically poison!
Excel's main component is glutaraldehyde, which is used as a disinfectant. It is very toxic, and very corrosive.

However, the dose makes the poison. Excel is a very diluted form of glutaraldehyde, and the amount that you are adding to your aquarium is not enough to kill fauna, provided it is used as directed.

Taking 1 or 2 aspirins can get rid of a headache; taking 100 will kill you.
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Old 08-16-2010, 09:05 PM   #11
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Quote:
Originally Posted by Darkblade48 View Post
Taking 1 or 2 aspirins can get rid of a headache; taking 100 will kill you.
That's what I was about to say.
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Old 08-16-2010, 09:36 PM   #12
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unfortunately I've seen people on the message boards here recommend a double and triple dose to kill algae... And seachem told me specifically not to overdose because the product is toxic in higher than recommended amounts.

to each their own tho!
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Old 08-16-2010, 11:33 PM   #13
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i've been dosing 1mL of excel every morning in my 10gallon with no ill effects to my RCS, all of them are still going about their daily business the same way they did before i started dosing.
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Old 08-17-2010, 12:53 AM   #14
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Just dont go crazy and you should be fine. Overdosing will kill shrimp faster than you can say red shrimp. I actually used it to rid my tank of any hiding rcs (after I tore the tank apart and manually removed any I could find) when I put snowballs in there to make sure there was no risk of crossbreeding.
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Old 08-17-2010, 01:03 AM   #15
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Some info on Glutaraldehyde:
http://www.glerl.noaa.gov/pubs/fullt...5/20050003.pdf

http://www.glerl.noaa.gov/pubs/fullt...3/20030019.pdf

http://www.ncbi.nlm.nih.gov/pubmed/17702354


There is more info out there, I just can't remember where I found it all. I had read an article about medical waste water containing small concentrations of glutaraldehyde impacting a large range of invertebrates and other aquatic organisms.

In my experience, long term usage of excel will effect shrimp and other inverts.
Even dosing as directed, I've had RCS and ghosts start dropping(that magically stopped after I discontinued use). Some people have good luck with it, others don't. My advice to you, is to read the info on glutaraldehyde, then test it for yourself maybe on only a few shrimp if you can. Or start by under dosing slightly, observe, and build up to normal dosage if you see no ill effects. DIY CO2 is safer IMHO(possibly cheaper depending on how much excel you dose). I don't use the stuff.
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