my canister xp3 filter is causing alot of air bubbles

its making a lot of air bubbles throughout my tank so many air bubbles that i can hardly see into my tank whats wrong

A: The answer to this question has been posted many times. You have air leaking into the system from the intake side. How to troubleshoot this problem is posted in the answer at the bottom of the Fistar FAQ Page. I believe it also covered on the manufacturers web site MarsFishcare.com and at the back of the Filstar Manual.