Personally I would put more LR in the tank, try to create your landscape now or at least get a good start on it. Remember, each time you add LR you will basically throw your system into a cycle, depending on what was on the rock when added it can be minimal to a major cycle. So adding what is needed now, will allow you to cycle the tank, setup the natural filtration process and stabilize things.
Biggest thing is not to rush, in my case I didn't add fish for 2-3 months, allowed the tank to really setup nice. Taking your time will hopefully mean more successful tank.
And have FUN!!!
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Setup: 180G DT, 105G Refuge (approx. 300lbs LR, 150lbs Aragonite)
Hardware: Super Reef Octopus SSS-3000, Tunze ATO, Mag 18 return, 2x MP40W, 2X Koralia 4's Wavemaker
Lighting: 5ft Hamilton Belize Sun (2x250W MH, 2X80W T5HO)
Type of Aquarium: mixed reef (SPS & LPS) with fish
Dosing: Mg, Ca, Alk
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