Filter spanner

[cjbaker]

Hi guys, I have a 3 stage RO unit and have just received my new filters. I'm having real trouble getting into the 5 micron carbon filter housing (see pics) has anybody come across this problem and is there a special tool to unscrew these?

Thanks

 

[cjbaker]

Forget that guys, just realised I've bought the wrong thing duh!!