Dieing SPS

[RedCoralEdmonton]

I agree that ULNS plus high alk = bad... either drop the alk or stop the ULNS, id bet money it fixes your problem

Steve

[daniella3d]

I almost lost all my zoanthids when I changed to H2O salt. Other people have reported they lost a few of their SPS when switching to H2O salt, especially digitata. When I returned to IO Reef Crystal my zoanthids came back. I never saw any effect on my SPS though.

Just curious but what salt did you use before and why/what did you cange for?

I changed because I thought that I would not have to dose any more with a stronger salt but I was wrong..it was more expensive and I had to dose just the same. Why did you change?

Originally Posted by abcha0s@conceptaquatics

I'm having anvery 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

[TimT]

My experience comes from a salt mix change from Reef Crystals to Marinium. It was only a 20% water change with Marinium and I started losing Acros the next day. Only acros were effected, no other SPS. After 3 x 60% water changes with RC in a week things started to stabilize. The manufacturer did admit that the Potassium was low.

[kien]

I had a similar episode last summer. Lost 80% of my SPS over 5 days and I hadn't even changed anything for months. My conclusion is the same as untamed and aquottro's. Some infection or illness perhaps. Remember that these are close nit colonies. All it takes is one Polyp to catch a cold and the colony is hooped :-(. You can actually see it as it unfolds. It usually starts with a very small area that gets bigger and bigger from that point as it spreads like wildfire. If you nip off the tips or branches before the infection has reached it you can sometimes save it.

Anyway, I never changed anything during and after that even. Tank still has the same flow, biopellets, carbon, gfo regime, same old same old. Although over the past few months I have been using a new salt with every water change. I rotate through Reef Crystals, H2Ocean, Royal Nature and Aquavitro. This is not for the faint of heart :-). Everything seems to be okay though.