Lerch....I may be wrong but you've asked this question previously about a few other corals???
Same answer here...Adaquate lighting to meet the requirements of the coral in question...same on current...
Personally I use dt's phytoplankton on a regular basis
several corals get food from the current/water column when I feed my fish...but maybe twice a week I will direct feed several corals(including a large hammer) with an assortment of thawed frozen foods...normally soaked in zoe.
For the hammer in particular it does not seem to require direct feeding as much as other corals...but I do try to spray some of the more liquid of the food mixture directly on its tentacles....it seems to like it....and is doing very well.