Our 2 cents….
Torches as everyone has said are finicky. They expect moderate and random flow as well as they want light. If they starve for light they tend to eventually fail at life, but same goes for if they get too much light. They like “dirty” water so you need to find the balance of high nutrients vs too high that you get algae break outs etc.
In our world we run gravity 1.026, alk in the 8’s. We never allow nitrates to get too high and keep phos from hitting zero. We use mp’s to produce random cross flow and changes through out the day. We never spot feed or mess with them, we just feed tank live copepods and live phytoplankton 2-3 times a week and feed fish pellets and/or flakes. We also run chaeto in sump to absorb ammonia and nitrates and phosphates etc.
Years ago we had issues with torches/hammers etc when there was too much light and improper nutrients.
Obviously if you have flat worms or other pests that will irritate them and they can recede and starve that way too or be eating and get infected.
Here is one of our office tanks, it’s only 10 months old but mixed coral…
Adding startup after 3 months stable per added coral and 7 months later