I'm new and glad I found this helpfull forum. I'm in a process of designing my new ATS, and I need to start up my new reef tank (90% dead live rock and 10% live rock)

So, I'll start with first question I have.

Do I need to use ATS in the very beginining of cycling my new tank? or ............ maybe after couple weeks, first to chek NH4 level........... :?:

Thanks a lot,

PS. I will introduce this forum to all my friends