Shrimp and CO2

Roboticsbede

I have a 5 gallon high-tech tank running for around 7 months without livestock, I just bought 5 cherry shrimp yesterday. GH - 7, KH - 7, PH - 6.7 - 7.6(due to CO2), TDS - 170 - 180, temp - 24.8*C - 25.5*C. Now I might be a little panicky but I haven't kept the shrimp for more than 24 hours. However when I was acclimating the shrimp I turned off the CO2, I acclimated the shrimp for around 4 hours of drip acclimation and 4 hours of temperature acclimation. They went into the tank and weren't shocked, but I noticed when I turned on the CO2 after like an hour of the shrimp being settled in(as there was still a few hours of photo period till my lights went off), all the shrimp started swimming around, not dashing though, they would swim around, land on somewhere, take a little a few bites, then swim again, until the CO2 went off, then they would still continue swimming, but not at the rate they were with the CO2 on. I know many people would say its from the PH drop, but I already did research, shrimp only gets affected by the drop of KH, not PH, as KH makes PH drop, as long as the PH is in the shrimp's range its fine. A picture below, is there anything wrong?
 

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FishSupreme

Check your co2 levels then test your parameters. Some people say TDS doesn't really matter, but 170-180 is pretty high.
 
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Roboticsbede

Check your co2 levels then test your parameters. Some people say TDS doesn't really matter, but 170-180 is pretty high.
My drop checker's at a dark green, so most likely about 20mg?
 
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FishSupreme

Should be fine as the danger level for your shrimp is 30mg. I don't know what may have caused this. My only other theory is that drop checkers are slow to update.
 
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Roboticsbede

Should be fine as the danger level for your shrimp is 30mg. I don't know what may have caused this. My only other theory is that drop checkers are slow to update.
They take 2 hours, my drop checker turn green at 7pm when my lights turn on at 5pm. Thanks though.
 
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Cherryshrimp420

PH swings will definitely affect shrimp. Where did you read that it doesn't?
 
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AggressiveAquatics

I don’t think co2 affects them. Mine swim through the Co2 diffuser all the time
 
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Roboticsbede

I don’t think co2 affects them. Mine swim through the Co2 diffuser all the time
Meaning I'm screwed with not knowing the reason at all.
 
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Cherryshrimp420

I don’t think co2 affects them. Mine swim through the Co2 diffuser all the time

The Co2 bubbles themselves don't affect them, but the swings in pH definitely will. Again, cherries are hardy so even in these Co2 tanks with day/night cycles they will survive but it is not a guarantee that newly introduced cherries will.
 
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Roboticsbede

PH swings will definitely affect shrimp. Where did you read that it doesn't?
 
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Cherryshrimp420


Hmm that seems like their personal anecdote:

"If we do large 60-80% water changes in our CO2 injected planted tanks, the pH changes a full 1.0 unit in 20-30 minutes or less, yet we never lose sensitive shrimp or fish if the other parameters are kept consistent."

So they are not noticing shrimp losses in own tanks so they think CO2 injection is okay.

But there's no cited sources, and their view on pH vs KH is not correct at all. The hydrogen ions in water itself (as reflected by pH values) does have a direct impact on fish and invertebrates. It doesn't need to involve KH at all.

Their view that CO2 induced pH is not the same as other acid induced pH change is also incorrect. pH is only concerned with the hydrogen ion, it doesn't matter if this is from Co2 or some other acid....
 
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Roboticsbede

Hmm that seems like their personal anecdote:

"If we do large 60-80% water changes in our CO2 injected planted tanks, the pH changes a full 1.0 unit in 20-30 minutes or less, yet we never lose sensitive shrimp or fish if the other parameters are kept consistent."

So they are not noticing shrimp losses in own tanks so they think CO2 injection is okay.

But there's no cited sources, and their view on pH vs KH is not correct at all. The hydrogen ions in water itself (as reflected by pH values) does have a direct impact on fish and invertebrates. It doesn't need to involve KH at all.

Their view that CO2 induced pH is not the same as other acid induced pH change is also incorrect. pH is only concerned with the hydrogen ion, it doesn't matter if this is from Co2 or some other acid....
CO2 in a Shrimp Tank - Shrimp and Snail Breeder
How about this article? I'm just really confused at this point.
 
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Cherryshrimp420

CO2 in a Shrimp Tank - Shrimp and Snail Breeder
How about this article? I'm just really confused at this point.

So the research they linked in this article was interesting. There was significant increase in mortality with higher CO2 levels. However, they only did this experiment for 96 hours! If they ran the experiment longer I'm sure CO2 levels below 23.8 mg/L will also have an effect...
 
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richiep

I'm agreeing with Cherryshrimp420
100% on this, shrimp can only take Co2 to a certain level and the ph swing is definitely a killer not the kh, the kh is only there to stabilise the ph but the Co2 messes all this up to a point where it will kill shrimp.
 
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