I have a 31 x 15 IG pool, using SoftSwim, and it has filter cartridges.

Is there any guideline for how often a good filter needs cleaning? I've found that I need to power-wash mine every 2 days. It's quick and easy, so I don't really mind, but I'm wondering if that's normal.

Will the cartridges stay less gummed up with a chlorine pool than a baquasil pool?