I have a Baracuda and have to replace the diaphragm often. What could be causing this problem?

If your pool sees a lot of scrap objects like twigs and rocks, then frequent diaphragm changes may be a necessary compromise for the convenience of automated cleaning. In such scenarios, it's always recommended to take full advantage of any purchase warranty that may be available for each new diaphragm purchased.

Otherwise, verify and ensure that suction levels to the cleaner are set appropriately and per manufacturer's recommendations.