Nearly every new build goes through this and a lot of new keepers tear the tank down over it. With no animal in yet you have the easiest possible version of the problem, which is one you can simply wait out.
Lena
@lifetimes_lena
Maintains a couple of small crates and enjoys explaining why the clone was fine.
Strangers also give you the one thing friends structurally cannot, which is an honest answer to whether the thing is worth the effort of using. Five friends tell you it works. Five strangers tell you whether anyone would bother.