We have a Beneteau 331 2003 with Air Conditioning. The intake port is an open thru hull and protected by a strainer before the pump. The area that we have our boat docked has problems in the summer with nettles and last week we continued to have issues with the nettles clogging the raw water stainer. Does anyone have any experience with this and is there a solution to this problem? One suggestion I received from another boat owner was to install a heavy duty pump with a stainless steel impeller, remove the strainer from my system, and let the impeller grind the nettles and push them throught the system. His retrofit has worked well for him for years. This sounds ok on the outside but there is usually more to it than that.