The flexable plastic of the cover of an a4 folder would do it
>> Stay informed about: Aquarium Tank Divider Question
but no, either should be fine with some modding
"e j" wrote in message
> Does anybody know which tank divider would be the best one to buy for a
> 20H Gallon tank to safely separate and breed 1 week old platy fry?
> Penn Plax Tank Divider 20 H
> Lee's AQ2 Aquarium Divider System - 20H Gallon