Easy and hardy. You should have no trouble with these.
Do you mean Gonipora? Very difficult to keep alive. They have a dismal survival record in captivity. Not looking good.
Likes the substrate and needs to be "dusted" on a regular basis to keep sand and detritous out of it's folds.
Needs to be in the sand. They have a tendency to move around so do not put in on the rocks where it can fall.
isn't it all about water quality and suppliments as well as lighting?
Lighting is very important. Most corals derive energy from light. The best way to keep water conditions high and trace elements up is to do regular and frequent water changes. If you do this you should not need to dose anything extra.