Oxygen and gas exchange

[hydride]

Hello, do shrimp need open tanks? At the present I have a very small opening in my tank setup, a circle with about 2-3mm diameter. This is to avoid dust falling in. Do they need more, or is gas exchange relatively minor? Thanks!

[sliphorn]

Hello, do shrimp need open tanks? At the present I have a very small opening in my tank setup, a circle with about 2-3mm diameter. This is to avoid dust falling in. Do they need more, or is gas exchange relatively minor? Thanks!

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The small opening you have is just fine. What is the volume of your tank?
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[Mustafa]

Also, can you post a picture of your container and opening so we can have a better idea what we're dealing with? As they say: "a picture speaks a thousand words."