I recently bought an 5 year old Artisan Island from my friends son.
Of course, getting it moved 10 miles, then creating a suitable base, having it wired up, and buying chemicals to suit etc was a job in it's self.
I gave the filters a darn good clean before we started to use it, but i thought i really ought consider replacing them, after all, i don't know how old they are or what sort of abuse they've had.
After a few days googling, i determined which ones i needed, and ordered them last week.
Wow, what a difference.
The flow into the skimmer box is so much stronger, i can now actively see water being drawn in.