I pulled the aeration diffuser out of my pond over the weekend and replaced it due to excessive back pressure at the pump. I must have missed getting it into the hydrogen peroxide bath when I was cleaning them back in the early spring. With a properly-washed diffuser ring it's back to ~8psi running pressure and making quite a large boil at the surface.
How high was your back pressure at the pump before you pulled that diffuser?
How visibly obstructed was the diffuser when you pulled it? Any chance a cursory inspection would NOT have caught the obstructions for the people that don't have a gauge in their system?
(For new members that might read this thread. I am not an aeration expert. However, I believe every single expert in the forum advises to include a pressure gauge in your aeration system!)
