The filter arrived and I changed it out and the residual chlorine smell cleared right up. I think the issue with the aftermarket filter was threefold; one, the center opening is larger than the Atlas Filtri cartridge, so the guide in the housing couldn't center it properly. Two, the aftermarket filter was just a bit (1/8") shorter. And three, the aftermarket filter was probably of inferior quality. I will only use genuine Atlas Filtri cartridges from now on.
- Roger Rheinheimer, Port Angeles, WA