Hey guys. I’ve been out of the reef thing for a few years now. Always had large tanks prior.
Recently I set up a Nuvo 20 AIO. Say about 4 months ago.
Everything overall has done well. It’s a mixed reef. Only issue I am having is keeping my kh and calcium levels correct.
My KH is always high it seems. Last week I measured it at 15.. so I did a large water change with aqua sds salt water (they use Red Sea Coral salt).
Well today my KH is down to 12.1 but my calcium is only at 320.

I’ve read online some people dose in their nanos, some don’t. I have the B-Ionic two part buffer system but I rarely use it.

Should I maybe just be dosing the calcium part of it to raise that?

Here’s my other tank parameters:
Temp: 78.1
Salinity: 1.025
PH: 8.0
Phos: 0
Ammonia: .5
Nitrite: 0
Nitrate: 0