In most cases, I have used physical removal of the infected wood to control infestations. Since the most common places to get an infestation are exterior trim boards and roof sheathing, this works great most of the time. If this is not an option, there are many ways to spot treat a small area. Tenting and fumigating your entire house would put your tank at extreme risk. Vikane (sulfuryl flouride), the most common fumigant, is soluble in water and highly toxic to fish and invertebrates. The fumigation companies will instruct you to seal your fish tanks with plastic and tape, but personally I would not trust this with a reef tank.