I started my tank new with Zeo and its doing well...have some nice frags growing. its only been 5 months. My only problem has been not changing my Zeolites out(went a couple weeks to long i guess) and caused some coral losses. Thats the only change i made and some of the frags i thought were toast turned around started growing.
It seems to devastate certain SPS immediately and others look unaffected. I had this happen twice. Since my tank was new an adding corals over the time I am learning which seem to be more sensitive.
I am now going to change them every 4 weeks to be safe.
I also started using the automatic elements