Neon Goby in my overflow

[Quagmire]

I use the window screen on the overflow of my anemone tank,and clean it once an day or every couple days with a tooth brush.Only takes a minute if you stay on top of it.I learned the hard way to clean it often,I left it too long once and the dirty screen wouldn't alow enough water into the overflow.Ended up overflowing the tank.