I bought my external filter new about 15 mths ago. It has a spray bar which when first installed did spray causing quite a bit of disturbance, Now it's more like a dribble bar.I've regularly rinsed and changed sponge filters, removed and cleaned impeller, rinsed substrat biological media and even renewed it recently. Spray bar and filter have been removed from the tank and cleaned although they weren't clogged up. Pipe from filter to tank appears clean although I've no way of reaching inside its complete length to clean it short of removing it completely. It has no kinks or tight bends in it. Yet it still has no pressure.
Any suggestions?
