I don't think I've tested ammonia in this tank, ever. Not with a test kit, anyway. There were zoanthids on the rock I started with, and they opened after a day, so that's a solid "no ammonia in here" indicator. I've never heard of a tank having detectable ammonia and happy, open corals at the same time. If all my corals are ever closed at once for no evident reason, I'll test ammonia when I'm troubleshooting. Until then, I don't bother.
As for most, that's phosphate for me. I haven't really had many stony corals for most of this tank's history, just a few small frags, so the main worry is that my nutrients don't get too low. I've checked salinity way more than phosphate, but that's not on the list.
As for most, that's phosphate for me. I haven't really had many stony corals for most of this tank's history, just a few small frags, so the main worry is that my nutrients don't get too low. I've checked salinity way more than phosphate, but that's not on the list.