Dieing SPS

[abcha0s]

I'm having a very simalar problem. Over the past two weeks, I've lost about 1/3 of my SPS. All of the parameters that I have tested are in range and stable.

I agree with Brett. Don't put your LED lighting over the tank until you have it stable.

I would look closely at the biopellets as a possible cause? If not directly, then perhaps indirectly. Low nutrient systems are know to be less stable. Your Alk is also high for a bioplellet system. Others have reported problems when their Alk climbs over 7.

I do have a question for the other posters - perhaps it will also benifit the OP. I changed salt about 3-4 weeks before my problems began. I'm not convinced the problem is the salt itself, but could the change in chemistry have caused the problems? Should I change back (another change in Chemistry) or should I ride it out?

Good luck with your tank Milad.

- Brad