I used a cheap homemade charcoal filter Now I can not guarantee it will work but here is how to make it.
Yu need about a foot or 18" of 2" PVC
You need one end cap that is a reducer to 3/4" threaded and a hose adapter (garden hose fitting) to go into that. I suggest cutting down a stainless drain cover to just fit inside the 2" fitting that goves over the pipe.
On the other end of the pipe a coupler to a threaded fitting. and a screw in reducer to 3/4" and the other garden hose fitting (Make that the female end)
To make filter
Start with some Filter Floss (Fish isle at Wal-Mart or Pet Store)
Pack it in about 1/3 to 1/2 the pipe
Then Activated charcoal (Same source) NOTE get the basic not the algaecide kind
Fill the tube almost full
Then a bit more filter floss (Say about an inch)
Screw in the "input" cap.
Every month or 2. .dump out the pipe and re-stuff.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times