I used to feed roids 3 times a week. But I could tell most of my corals weren’t eating. You can tell when they’re eating. Some extend their feeding tentacles while other contract them in. For example my frogspawn will completely pull its tentacles in whereas acans will extend their tentacles that usually can’t be seen. Some corals prefer daytime feeding (like my galaxy) while some prefer eating at night. I now feed roids only once a week. I feed my fish LRS reef frenzy food and there are lots of tiny piece that the corals also feed off of. Trying to keep my nutrients at decent level.