On a side note down memory lane: The SPS that is encrusting Luisgo’s front glass takes me back to the mid 1990s when I first saw a picture of Julian Sprung’s Acropora (A.cervicornis if I recall correctly) encrusting the glass of his famous 15 gallon “micro” reef.  These were the days when Acropora husbandry was still black magic and when we called nano reefs micro reefs.