The assumed 'bowing' in the picture is the fish-eye effect from your camera's lens. No biggie, but the lack of some sort of cushion under the tank is a little scary... foam is generally used to cushion the bottom of the tank against any sort of imperfections in the surface that the tank is sitting on, so that there is no localized stress on any one part of the bottom panel of the tank. This reduces the risk of cracking over the long term.
That said, you seem to be off to a good start!
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Calvin
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Planning a 29 gallon mixed reef...
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