I recently purchased a Nautilus Plus and it does the job of picking up debris very well. However, even with using the fine filter cartridges, the algae on the bottom of the pool doesn't get caught by the filters. Instead, it blows through the impeller out the top, kinda like a smokestack. It picks up sand, small sticks, leaves, etc, quite well, but the algae seems to blow right through it and clouds the otherwise clear pool. Is this normal for robotic cleaners?
I did check and re-check that the filters were clean and installed properly. I also put a question in to Maytronics but have not heard back.