skimmer for bc14????

[lechee12]

can anybody reccomend me a skimmer to fit int he back compartment of my bc14??

or if anybody have opinions about these three skimmer:
http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+4392+23714&pcatid=23714

http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+4392+21416&pcatid=21416

http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+4392+24108&pcatid=24108

thanks