Good deal on the setup
You know you can rewire the 430 to run a 3rd vho depending on length, how long is the tank?
Have you read up on the sandbed vs no sandbed vs
deep sand bed debate?
Before spending any more money sit down and decide what types of corals you want to keep, if you are only going to run VHO light that will be a limiting factor, should be sufficient for most
soft corals and the like, but probably not enough light to keep clams or most SPS corals.
Differnt corals have different needs, so by choosing the biotope you want to emulate you can focus on setting the tank up for that.
Personally I would save the money for live sand, if you must have a sand bed a shallow layer of aragonite oolitic sand is a lot easier to clean over time and less apt to become a nutrient sink like a deep sand bed
Get all your rock at once and let it cycle, have patience, if you let it cure in the dark for 2-3 months it should expell all the nasties in and on it and be more stable in the long run, read up on "cooking" liverock
The bioballs you can do without, the liverock will provide filtration, refugiums or algae filters in sump can create issues of their own and add complication, I would rather spend the $ on a good skimmer, since you got a sweet deal on the original setup that would be the next major purchase, dont skimp on it, get a good one the first time
Take your time in the planning stage, run your questions and ideas by us and we can give you ideas on what works and doesnt. While its possible to throw a reef together quickly, look at the endless stream of threads on hair algae/cyanobacteria outbreaks and incompatability issues
Take your time, learn lots and enjoy
