I'm heading into the final phase of my planned 350 litre tank set-up. Substrate...........Sorted.

Now background features. Has anyone ever used or considered using coarse, black open cell foam for the internal backdrop? The type used in large pond filters.

It strikes me as to potentially increasing the nitrifying bacteria load. Would make an easily adaptable plant holder. Can be shaped easily and highlighted with paints if needed.

Any thoughts guys?

Ian