Is this stability?

[LardLad]

I have been keeping a 2g cookie jar reef with 3.8# live rock and ~2.5# aragonite Fiji Pink. I do 100% water changes once per week without fail. I use Red Sea Coral Pro salt and RODI @ 1.026 SG. Heat is strictly controlled at 78F. I dose Brightwell Coral Aminos about 5 drops per week and one small ReefRoids feeding 2 days before water change.

Livestock (coral only, no fish, no inverts)
1 chunky Nuclear GSP
1 medium Pagoda
1 chunky Bubble Euphyllia
1 medium Sympodium
1 3 head Blasto
2 small Zoa frags

Here is the question:
With a 100% water change, my NIT and PHOS are near zero at the beginning of the week. The DKH is between 10.7 - 11
When I test right before the water change my NIT is 2. My PHOS is 0.02, DKH is 8.7. There is no evaporation; salinity is constant. Temp is constant.

Is this sufficiently stable?

Should I micro-dose TM All for Reef for ALK? (that is what I do in my nano 13.5g)

Is this range acceptable to most reefers in a coral-only tank?

I would like to have a Maxima clam. Is this a do-able swing?

I seriously appreciate the insights.

 

[laverda]

I think that is to big a swing in Alk. If you add a clam it will be much worse. I would do 50% changes twice a week or less.