The pH should be somewhere between 8.0 and 8.2. Some test kits for ammonia and nitrite do not have fine enough gradations to measure very minute quantities and will simply register zero if the ammonia and nitrite are at safe levels. The tank lights should be on for 12 to 16 hours per day. If live rock is used for biofiltraton, it must be fully cured before fish are added to the tank. A protein skimmer is always desirable.
Adequate aeration is absolutely necessary to ensure sufficient dissolved oxygen in the water.
If you use powerheads on an undergravel filter and they don't provide aeration for the water, airstones must be added. I cannot overemphasize that the fish I'm recommending will only do well if kept in a saltwater tank that is running correctly. Of course, no matter how hardy a species of fish is supposed to be, if you don't acquire healthy specimens there is little chance of success. Finding healthy fish starts with choosing a reputable store to do busines with. Some employees will get to know you and your tank, making it easier for them to help you with any problems you might encounter.