I am very pleased with my Aqua C's. I have had 0 issues and never have to adjust to get a proper skim. I did clean up the injector & pump last week. I noticied a slight change in performance. It appears a piece of rock was trapped. Do you use Aqua c?
both of mine do the same. It is very efficient in cleaning the water and it knows it. I clean mine every 3 days also. Great quality skimmer for the money.