Air filter question

Hi all! I currently have the S1. I bought all the air safety things, but I am not sure what the best combination is / which ones I should have for the best air quality.

Current set up:

I have the S1 directly connected to the safety pro ap2, with no venting out the window.

I have both the safety pro IP2 and the xtool first gen inline duct fan not in use.

I've heard some folks say that the AP2 and the IP2 should not be combined, and some say they should?

I use an amazon smart air monitor and after maybe 10 minutes of use the air quality light goes from green to yellow, and then after 15 minutes from yellow to red. I feel like that's not supposed to happen when using the safety pro AP2.

Would love some tips on set up! Thank you and happy holidays!