Flow pur water filter

[Lake Huron]

My 17 Northpojnt has a Flowpur water filter system. For the life of me I conant seem to find the paper that came with the filters to know which one goes in there. Can't remember either. So Ii went to their site and found a few options. The (new) #8 looks like the one I took out when I winterized it a week ago. I see they have the 975 that according to the description it's supposed to be a better filter, but it's 3x the price of the #8. When I pulled the filter out of the canister there was a little bit of sediment in the bottom. Filter particles maybe? Hard to tell. Realistically in a season it'll filter out 2000gal or less.
Which filter(s) do you guys use/recommend??

[RPR]

Take old filter to hardware store to match it. Sediment is not unusual. Filter is blocking it from getting into your lines