ok, thanks. I will see how it looks when it arrives, if it's even going to be practical in my tank (the background) and then decide from there if I will go ahead and silicone it.

Has anyone else had issues with FF getting OUT? I am fairly certain they are coming out of the screen at top, and I have half covered by the hood (which allows them to come out the back if they want) and the other half has an actual cover of glass over it. Other than that I can only imagine they are coming through the front vents, or the sides of that front door where there is a small gap for the door to swing out. I hate finding them in my carpet and have killed at least 5 just today, and I am more worried about a larger infestation if they get out and start laying eggs!