Thanks, I really appreciate it!
Yah those rocks are a combo of some BRS rock I got, and some older rocks I acquired throughout the years. About half the rocks in the tank started dry, the other half came from a 40B i had setup as a transition tank. But those rocks started dry in the 40B as well.
For filtration I've just got a TLF reactor with GFO, I change the media about once every 30-40 days, and I do weekly WCs of about 15gal. My NO3 and PO4 are both undetectable with my Salifert test kits.
Let me know if you have any other questions and be sure to send me a link to your thread when you start your 93G!