This may or may not be a very stupid question. I have read a lot about adding calcium to your aquarium for coral growth and health. But I have been getting some mixed answers on wither or not adding extra supplements such as calcium is really needed for coral health, that’s if you do routine water changes. I would prefer to not have to rely on having to add expensive supplements to my tank a few times a week. I currently have a 55 gallon tank with 80 lbs. of live rock and about 2″ of live sand. I do a 10% water change every 2 weeks. All levels are where they should be. I have a leather coral, a long tentacle plate coral, some mushroom corals and a couple of polyp corals. I would like to add some more soft corals but would like to make sure that they ar