38 Gallon Mixed Reef Cube Newbie

[Tigweldpro]

Hi, I'm starting a new thread in the tank journal section.
I have many freshwater tanks and have decided to try a small reef cube.

Current setup
TANK
-28G glass cube, 3/4"bean animal overflow box
-10G sump, bubble magus 5 skimmer, sicce 3.0 return pump, large refuge, 12w led grow light, provisions for 3 reactors, 200w fluval digital heater
-165W dimmable china LED
-20lbs Fiji pink live sand, 17lbs marco dry rock/3lbs live tonga branch
LIVESTOCK
-1 sailfin blenny
-1 Mexican turbo snail
-2 trocus snails
-2 red hermit crabs
WATER
-77*F
-Salinity 1.025
-PH 7.9
-Ammonia 0
-Nitrite 0
-Nitrate 1-5ppm
-KH/Alk 8.1dkh, would like 10dkh
-Calcium 340ppm, would like 450
-Magnesium 1320ppm, would like 1450

I know some of the levels are a bit low I need some advice on what to start dosing. powders vs liquids, best brands, 2part, kalkwasser.... not really sure where to start.

I plan to add 2 clownfish, watchman goby/pistol shrimp, bicolor dottyback, feather duster worm, zoas, torch coral, encrusting monti, mushrooms, No plans for sps

Some advice/comments would be greatly appreciated.