SPS help needed...(Classic title) :)

[JohnnyTabasco]

TropicMarine pro coral elements. 1 teaspoon a week.

 

[CindyKz]

This is interesting. I used to do weekly water changes and everything was fine. I've dropped the water changes to every 2-3 weeks and have seen similar problems with some (not all) of my SPS, which I wrote off to alk swings. Obviously the alk swings didn't help, but it makes me wonder if I'm getting depleted on something between changes.

 

[JohnnyTabasco]

Try running without AC for a month. I think many people use AC with no real reason. Just add it for a couple of days if the tank smells or gets a yellow tint.