letter hanging box and mesh window screening

They sound safe so long as the hold water, as obvious as it sounds. I've never used any divider so I can't really comment on it...

I can't speak for the "letter hanging boxes" but like jpappy said, it shouldn't be a problem as long as is holds water.

I use mesh window screening a lot to make egg traps, breeder nets, dividers, I've used it in filters, I've even used it to make screen lids for a couple of 10g tanks all with no ill effects to the inhabitants (fish & inverts). The kind I use is fiberglass screening that you can pick up @ any big box store. As long as it's not aluminum or metal screening then it shouldn't be a problem.

i assume you mean something like this, but acrylic...


if so, that should be safe.

the window screening should be no problem, either. the one thing i would do is run it under the spigot in your sink to make sure you don't get a milky film or bubbles that run off from the screening before you use it. if you do, just look for another brand or in another store and be sure to use fiberglass screening only. nylon typically is not acceptable nor is steel screen.

Hmmm...I was picturing one of these :huh:

if he's small enough and you can keep the water params in line, why not.

to be honest, i wasn't thinking something to be used as a specimen container. doh!

is fiberglass screening ok under water for long periods of time?