Salt and heat, Salt helps stimulate the fishes natural defenses, i typically add varying amounts from none to some. You can pick up 40 lb bags at hardware store, water softening salt. Cichlids love it. Heat also speeds up their metabolism. If you just moved the tank, a massive water change may not be the best idea. You just added lots of new water, and may of lost some beneficial bacteria to chlorine or cloramine in the water. Another large water change would mean that the bacteria is going to get another dose and you run the risk of an ammonia spike.