How to Keep fish out of Weir

[fishstix]

Some of my smaller fish keep getting into my wier, and it very difficult to get them out of the box behind the tank. Any suggestions how to keep them out? I have an Exotic Marine Systems overflow box.

Thanks

 

[lapin]

You could get a piece of egg create. Paint it black. Get some plastic screen, like used for a tank cover. Cut the egg create the length of the overflow and a few inches tall. Cover it with the screen. Small black tie wraps work good. Then clamp it to the over flow. Use plastic clamps
amazon sells these

Excel 55663 2pc Small Bar Clamps - USA

Excel 55663 Small Plastic Bar Clamps. 2 per package. For clamping delicate work where proper tension is a must. Notched jaws to help keep projects steady and easy to use quick release lock. 3 1/4 inch opening 1 inch depth. Compare to X-ACTO X7003 Small Plastic Clamps. Made in USA

widgetsupply.com