How often do you replace your filter?

[RavenNS]

BNKY,
you could buy filter cleaner as well ( chemical that eats all the gunk up) if replacements are expensive or difficult to find.
I wouldn't worry that much about unicel not making your size though; I have one very old hot tub that was discontinued ( maybe in the 80s..?), but can still get filters for it through them

[bkny1055]

thanks RavenNS for the info, my filter was looking old, this new filter works like a champ along with my new Baracuda G4 levels also looking good and holding