You will want to keep the phosphate levels in check. High phosphate levels can be damaging to corals, especially stoney corals, such as Tubastrea. For a nano tank, one of the best options for maintaining water quality is a constant water changing setup. I do this for my Solana and using a pair of dosing pumps. One pump draws from a 40 gallon fresh saltwater reservoir to pump into the tank, and the other pump draws from the tank and discards old water. With this setup, I effectively do a 100% water change each week. Since we're talking about a small amount of water in a nano tank, it isn't much at all in terms of salt expense. Combine this with a refugium and/or skimmer and you should have no problem maintaining excellent water quality, even with tons of feeding.
Still, I would avoid using a consistent lighting scheme if you're going to go all non-photo. Algae will always be a challenge in a highly-fed tank. Even if your phosphate/nitrate levels are undetectable, you could still have a situation where the algae is gathering nutrients faster than they're removed. You could use carbon dosing to prevent this, but why bother with it when you can avoid the problem simply by keeping off the lights. You can always have a light to view the tank whenever you want. If you do want to use a light on a consistent basis, try having the light on a day-on, day-off alternating cycle. This will prevent algae growth while still allowing for regular viewing.
