How much aeration is too much?

[dw1305]

Hi all,

because pearling does in my experience correlate strongly to lethargic behaviour in fish when I am really pushing my carbon dioxide injection rates in my planted aquariums at home. Do other people observe this? So potentially livestock have to put up with a pH drop, elevated carbon dioxide, and elevated oxygen levels.

I'm not a CO2 user, but in pond aquaculture, where you have (in our terms) <"grossly polluted"> water <"oxygen supersaturation"> is a known issue in certain conditions, warm water, hot sun, very little water movement. At very elevated oxygen levels <"you can get oxidative damage to fish and shrimp gills etc">*, this paper talks about "total dissolved gas" (TDG) levels. There is some discussion of <"oxidative stress damage"> in mosses in <"'Eruption', my lockdown scape">.

Yes, I remember that thread. @dw1305, do you know where I can find it?

In <"Canford Park">, home of the <"deceased Goldfish"> - on UKAPS at <"A question, dissolved oxygen and a pond">.

*Ji, Qianfeng & Xue, Shudan & Yuan, Quan & Yuan, Yuan & Wang, Yuanming & Liang, Ruifeng & Feng, Jingjie & Li, Kefeng & Li, Ran. (2019). "The Tolerance Characteristics of Resident Fish in the Upper Yangtze River under Varying Gas Supersaturation". International Journal of Environmental Research and Public Health. 16. 10.3390/ijerph16112021.

cheers Darrel

 

[jaypeecee]

Hi @dw1305,

Thanks for the links. I was surprised to discover that the Canford Park post first appeared back in August 2019! Tempus fugit!

JPC

 

[MichaelJ]

Tempus fugit!

Time flies indeed 🙂

Cheers,
Michael

 

[FISHnLAB]

Wow, this thread sure turned into a great discussion. Thanks for all of the input guys👍.