Without real plants, there'll be nothing to soak up the excess nutrients produced by the fish waste and nitrogen cycle, so you'll need to do more water changes to keep the water conditions optimal (and avoid algae bloom).
Perhaps consider adding fast growing floating plants instead... like frogbits, salvinia, dwarf water lettuce etc, they will utilize the lights and soak up nutrients to help keep the water cleaner (no need Co2 injection to boost growth since they will already use Co2 directly from the air). The fishes will also appreciate the shade too.
The only thing to do is to remove bunches of them when they start covering the water surface (its definitely much easier than maintaining and trimming real submerged plants).

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