You should not be looking to get a monitor because it could go in there, you should be looking to get a monitor if and only if you are after specifically a monitor, then do the research an find out what it needs. As it is, any fish tank will need a certain amount of modification before it will hold the heat and humidity monitors need. Screen tops are a no-no.
Monitors and turtles will not work together. The turtles will take chunks out of the monitor and the monitor will kill the turtles.
Roughneck monitors can reach four or five feet, so no.
If you made the right modifications, those dimensions could work for one of the dwarf monitor species, such as ackies, tristis, etc. There are a number of things to take into account, one of the biggest being that most monitors burrow, and all females need a place to lay eggs. If you were getting ackies, you would be looking at adding at least a foot of sandy soil to the cage to allow for proper burrowing and nesting. Really, you would be better off ditching the tank and simply building your own cage if you intend to get a monitor.
Monitors and turtles will not work together. The turtles will take chunks out of the monitor and the monitor will kill the turtles.
Roughneck monitors can reach four or five feet, so no.
If you made the right modifications, those dimensions could work for one of the dwarf monitor species, such as ackies, tristis, etc. There are a number of things to take into account, one of the biggest being that most monitors burrow, and all females need a place to lay eggs. If you were getting ackies, you would be looking at adding at least a foot of sandy soil to the cage to allow for proper burrowing and nesting. Really, you would be better off ditching the tank and simply building your own cage if you intend to get a monitor.