Sorry for my delayed response. I think everything survived, tangs look much happier! I guess I should expect it to cycle but not ready for more ugly algae, I was previously battling some sort of turf algae, or bryopsis. Always something...
I have more rockwork to add and need to start cycling it in a stock tank. Wish I could just throw it in the DT since I expect it to cycle, but I don't want to make things worse..
Thanks again for your help, I still cant get over how heavy that aquarium was...