Will this cause problems?

I wanted to print this and and put it under the substrate for corys to explore. But now that I'm looking at it there's gonna be very little circulation down there, will that cause problems? The only access point will be the tube all the other openings will be pressed against the glass.

I wanted to print this and and put it under the substrate for corys to explore. But now that I'm looking at it there's gonna be very little circulation down there, will that cause problems? The only access point will be the tube all the other openings will be pressed against the glass.