If you're doing regular water changes, your calcium won't drop down that low at all. 390-400 is actually a little above natural sea water levels of calcium. No, the soft corals do not use calcium at all, neither does your anemone. Whether or not they will thrive in water without calcium is a moot point because doing regular water changes will keep your calcium consistent.
If your calcium is dropping that low, you need to do water changes more often. The salt you use has calcium in it. The amount of calcium will vary according to the brand you're using. However, all the brands will have enough calcium to keep your tank inhabitants healthy, as long as you're doing water changes regularly.
Being in Palm Springs, why don't you just go to your LFS, or any other LFS in the area and purchase Salifert test kits. I'm sure there's several in your area that carry them. This entire thread is somewhat useless without accurate test results....and if you aren't going to take the advice that's given to you.
I don't mean to be blunt, but you came here asking advice. Several people have given you the same advice over and over again. Yet you still seem to think that those answers aren't the proper ones.
It's quite simple...if you're giving your tank inhabitants the proper environment to thrive in, they'll thrive. If you aren't giving them the proper environment, you need to make changes. If you don't know what the proper environment is, you need to learn those things...preferably before purchasing the livestock.
If your calcium is dropping that low, you need to do water changes more often. The salt you use has calcium in it. The amount of calcium will vary according to the brand you're using. However, all the brands will have enough calcium to keep your tank inhabitants healthy, as long as you're doing water changes regularly.
Being in Palm Springs, why don't you just go to your LFS, or any other LFS in the area and purchase Salifert test kits. I'm sure there's several in your area that carry them. This entire thread is somewhat useless without accurate test results....and if you aren't going to take the advice that's given to you.
I don't mean to be blunt, but you came here asking advice. Several people have given you the same advice over and over again. Yet you still seem to think that those answers aren't the proper ones.
It's quite simple...if you're giving your tank inhabitants the proper environment to thrive in, they'll thrive. If you aren't giving them the proper environment, you need to make changes. If you don't know what the proper environment is, you need to learn those things...preferably before purchasing the livestock.