It is better to have a continuous head. I find that a skimmer can take time to get going so having consistent production means that the skimmer is working more efficiently. If the skimmer is oversized for the bioload you wont get a good head on it.I know this is an older thread but I have a question on skimming.
Does it matter or is it important to have a "continuous foam head" or is it ok if the skimmer still bubbles but does not produce a foam head all the time? Say if the skimmer has skimmed the water clean and it will stop producing foam for a while until there is more in the water to skim again. And leave the skimmer setting alone (once tuned in) and not try adjusting constantly and chasing the "foam head" Is one way better and why?