Zoas are pretty hardy, the less colourfull ones seem more hardy than the more colourfull, im sure your tank will be fine with them.
Acclimatise them like you would any other coral.
Get the zoas up to temp by floating the bag.
Drip your tank water into the bag, empty half the water out and fill again. Do this a few more times until almost all water is changed.
Inspect the zoas very carefully for spiders and snails etc.
Read about the zoa dip on this forum, pretty important to do this.
