best way to keep fish in a tank is under lock and key.... 
ok really now, make a screen using this stuff. watch the video on the page..
Clear 1/2" Screen Netting 6.5' x 2.5' - English
ok really now, make a screen using this stuff. watch the video on the page..
Clear 1/2" Screen Netting 6.5' x 2.5' - English