Thanks for all the help, but... its sooo bad that when you open the airtap even a small amount it makes the tank look like snow. the skimmer was running fine for over 8 months.
Got a friend who's using a MCE600 hang on . Its worked fine for ages. Now suddenly throwing heaps of bubbles into the tank! Cleaned Everything nothings blocked or dirty???? Anyone had experiance with this??? No guessing please. Could it be something to do with the pump flap on the Aquabee??