Hey so new to this forum and was just wondering what you guys think of putting a refugium behind the Nuvo 38G tanks. The tanks are really nice and I love it, but there is really no room for anything. I was looking at it the other day and it seems like this would be a perfect spot, but never had one on my last tank so not sure. I would add a small light back here and some sand and rock along with a ball of cheato. Do you guys think this will work and actually be effective? Or is it too deep? thanks any advise or other ideas are appreciated.

Tank by turbonutzz, on Flickr
By the way this is a stock photo, don't have a heater back there.