I have had my Polaris 965IQ robot for about a month. I'm very happy with it. It replaced a pressure side Polaris 280 that was years old but well maintained.
I thought my Polaris 965 did a good job of cleaning, it looked really clean to me and far better than what my 280 could do. But someone on the forum told me to get the ultrafine sand and silt filter. I just got it a few days ago and yesterday I ran the robot with it.
For the record, the pool looked clean to the eye. Sparkling clean.
After a smart cycle and a floor cycle (both run sequentially as I wanted a deep clean) I opened up the basket and found this...

Unbelievable how much silt I had in the pool..! I use an automatic cover and it's closed at nights and when it's windy (to prevent leaves from landing in the pool).
This filter is amazing! Best buy ever!
I thought my Polaris 965 did a good job of cleaning, it looked really clean to me and far better than what my 280 could do. But someone on the forum told me to get the ultrafine sand and silt filter. I just got it a few days ago and yesterday I ran the robot with it.
For the record, the pool looked clean to the eye. Sparkling clean.
After a smart cycle and a floor cycle (both run sequentially as I wanted a deep clean) I opened up the basket and found this...

Unbelievable how much silt I had in the pool..! I use an automatic cover and it's closed at nights and when it's windy (to prevent leaves from landing in the pool).
This filter is amazing! Best buy ever!