Ended up using New Life Spectrum Ich Shield for the treatment this round after removing all the corals from the 720. Fish are doing much better did lose some good ones though: emperor angel, Heniochus butterfly, snowflake clowns, mimic tang, blue eyed tang, maybe a few others. This rock stack is impossible to find the dead fish when they wedge themselves into the reef... I was only able to find half of the bodies to remove them from decaying in the system...