We have always had Freshwater tanks but I would like to add a Salt Water Oceanic BioCube 29 gallon to start out with. I like Arco's and Chalice for my corals and a pair of Clowns. Any suggestions from the forum either good or bad on what I'm wanting to go with?
If you haven't already done quite a bit of research on alkalinity, I would do that before adding more than one stony coral to your reef. As people have said, small tanks can be a bit tricky once loaded up with stony corals.
In a nutshell, They use alkalinity quickly and there isn't much in seawater to begin with, so their usage can make a big difference, quickly. Unfortunately, alkalinity is pretty much the linch-pin of seawater chemistry so the tank crashes when there's not enough of it. This makes management of alkalinity one of your top jobs, if not the very most important thing you'll be doing for your reef.
Starting with only one stony coral with allow you time to learn and get used to all this, including what a BioCube can and cannot grow in terms of coral. Unless you got the HQI version of the BioCube, it's not the best candidate for some of the corals you've chosen so far. There are options though.
Orange Montipora digitata - not the one that you can see has pale skin under the polyps....only the classic one that's solid velvety-orange with polyps - would be a great candidate. It's good-looking under almost any conditions and reasonably fast growing so you can see the fruits of your labor (or error of your ways) quickly. Once you are comfortable (which may not take long....YMMV), there are plenty of chalices that would be very happy under your lights, maybe even some acros, but you will have to be fairly particular in choosing types that do not require super bright lighs.
$0.02 I hope this helps!
-Matt