It depends. If it is fish only it is fine, infact prefered. If you are keeping SPS however they benefit from the daily feedings as the fish waste is food. Don't forget that Dinos most often mean you tank is going through a cycle. They can not be prevented IME and will go away on their own.....most of the time. My guess is whatever you did to get rid of the Cyno has left the water chemistry changed and the tank is just reacting to it.