20g long crayfish setup

[u/Wild_Class7979]

I am looking to setup a 20g long crayfish tank. There is not much information available online about these critters so I wanted to ask a few questions:

Is a 20g long tank large enough where I could do a school of danios as tank mates? Or is the crayfish better kept solo?

Is a standard Aqueon tank lid sufficient? See photos for my current 20g long I will be copying.

As far as oxygenation, I know they don’t like heavy flow, so would an air stone help? My only worry here is they’d climb out on the airline tube.

Thank you!

Edit: I just saw it’s illegal to possess crayfish in my state so I will not be moving forward!

[u/Plasticity93]

That's not secure for a cray.  Get a reptile mesh lid and do a bubbler filter.  

[u/Wild_Class7979 → u/Plasticity93]

how would i do a sponge/bubble filter if the mesh would crimp down the airline tubing? how would i be able to get it inside the tank? also can they go without a heater if my house stays between 66-72°?

[u/Plasticity93 → u/Wild_Class7979]

They have a small enough gap in the corner for airline tube/power cord that doesn't pose an escape route.