Lighting Diffuser aka Egg Crate

[dueho]

What do you use them for? Do you swap out your glass-tops for these?

[biggin]

I use them for dividers....tops....boxes for fish who need a prison cell.... sifter for gravel....lots fof stuff.

What do you use them for? Do you swap out your glass-tops for these?

[kewlkatdady]

the main use is to this under the substrate to make sure that fish can't dig all the to the bottom or the ugf...
some people use them as top for their tanks...

there are MANY uses for this stuff in aquaria, so use your imagination.