Need opinions on STN

[GobyWanKenobie]

The tissue recession is very slow. It doesn't peel off, just slowly creeps up the stem. I buy frags from everywhere. I keep them in the basement tank for awhile until I decide to move them to the DT. They were in there for quite awhile before they started to stn. The closest corals to them were other acros, some newer, and some old ones. When this happens, it can be a newer coral or an older one that I relocate. It has to be something that slowly weakens them until they give into stn.

 

[delta]

What type of salt are you using?

Any chance your RODI is not up to par?

 

[GobyWanKenobie]

Salt is Reef Crystals. In-line tds meter on RODI is 005. I have all new cartridges, but I was waiting for warmer weather. If it were my RODI, I think all my tanks would be hurting, and luckily, my sps tank in the basement is doing very well.