75G Reef Build

[Dad & Matt]

Hi everyone. My son and I are putting our 75G tank back together after a 5-year down time due to a move to a new house. (My wife and daughter have been after me the whole time to get it done. I had other things like painting, finishing the basement, landscaping, etc that took priority.) It was fish only with a wet/dry sump before but now I want to a reef tank.

Here's what I have so far:

75G tank with pre-drilled overflow
20G three-stage sump
Mag 7 return pump
Aqua-C EV120 skimmer with Mag 5 pump
2 Max-Jet 900 powerheads with wavemaker powerstrip
48" Nova Extreme light kit with 2 acitinic and 2 10000K lights

At this point it's all hooked up, water is in (SG: 1.024), with a shallow sand bed. I just got 50# of dry rock from Tampa Bay Saltwater. Cool rock, lots of holes. Pictures below. Once I'm happy with the aquascaping I'll add more sand/crushed coral to get the bed 3-4" deep. My plan is to add 50# LR, once I figure out where to get it. A couple of questions:

My son and I like the aquascaping with the dry rock. I tried to add some height. It's solid, but now I'm wondering if I should keep the dry rock lower and use the LR to add height? Any advice?

I'm thinking I'll buy the live rock in 2 shipments of 25# each. Does that make sense? Any suggestions on where to buy LR online?

Thanks for all your help.

Dry Rock.jpg

Dry Rock 2.jpg