Hey, I haven't said anything yet lol

but I would say I agree with Amy and Elly. Ants in a tank will end up very badly. Myself I'd rip everything apart, it is fairy easy with your tank. Don't use any insect killing chemicals, they are deadly for frogs.

Try to find the source, I had that wax pencil, I don't know what that was exactly, but I had to draw with it a line around the windows and doors.it's been 2 years since, not a single ant getting in, and it used to be bad. May be there is Smth like that in stores around you?