[hrutan]

Any suggestions for how to do this? All the dividers at the pet shop were translucent.

 

[AquatiBetta]

Craft mesh and report binders, cut the craft mesh to fit your tank then attach the report binders at each edge to fit your tank, they work great!

 

[InStitches]

I've recently someone use corrugated plastic (coroplast, like what signs are made of) to make a divider, with a section cut out and covered with craft mesh to allow water flow through.