Is this lid tight enough?

[40g]

heya! New here, hi!

I got this gap at the back of my tank, but there’s a lot of rock work there. You think it’s ok?

Looking to add six line wrasse, and maybe diamond goby.

Currently home to 2 clowns, 5 chromis, 3 pjs, and 1 scopas tang.

Tank is 40gallons.

Thanks!

 

[TX_REEF]

To be honest, fish are most likely to jump at the edges. I’d add some additional netting or mesh to those open spots since they are in prime jumping territory, since you’ve already taken the effort to cover the system. I run an open top system, and have found a Diamond goby on the floor before.

 

[40g]

Figured! Thanks. Sorry about your diamond, that’s the species I was thinking actually!

I have this opening here too, it’s a handle / feeding hole. Guess I’ll need a lid for that too. A lid for a lid!