Did some test for the first time.
Salinity 36 PSU/35 PPT
Ca 450
Alk 13
Mg 1350
Nitrate 10
PO4 0.03
For Ca and Alk I use kalk in my ATO and looks like I could reduce it from being fully saturated. The ATO runs 24/7 spread out pretty well too. I don't allow it to run more then 5 seconds at a time with at least 10 minute between runs.
Mg I add about 1/4 cup to my water change water of Instant Ocean that changes out about 30% monthly at about 1% daily. IO has an Alk around 10-11 so I could add some muriatic acid to reduce this a bit too. I've done this before until my stonies started taking off.
I feed super heavy. I have an Apex AFS that runs at 11am, 3:30pm, and 9pm with two turns each time. Filled with NLS little pellets.
I put in at least one 8x8 sheet of nori every day. Sometimes twice or three times.
I feed at least one cube of something meaty everyday. Sometimes 2 or 3.
My fish then feed the corals and disgustingly themselves as well with their own poop. They go nuts chasing each other when they see something starting to come out or they smell it. I'm pretty sure that's all my yellow tail damsel eats.
Between water changes and food my trace elements should be taken care of.
I do dose Iron. So, I'm sure that's elevated above natural sea water levels.
I dose vinegar as well which the acetic acid can be consumed by many things.
Nutrient export is obviously the ATSs that are both doing great and the water changes. No more skimmer right now. No socks. No mats. I don't vacuum out and clean the sump.